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Home Return to list Small Craft Advisory 0083 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-09-19 14:56:24 025 WHUS73 KLOT 191956 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 256 PM CDT Sat Sep 19 2026 LMZ740-741-200400- /O.EXP.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/ /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... ...PREVIOUS SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ742-200400- /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Northerly Island to Calumet Harbor IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Northerly Island to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-200400- /O.NEW.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-200400- /O.NEW.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: New Issued At: 2026-09-19 14:56:24 025 WHUS73 KLOT 191956 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 256 PM CDT Sat Sep 19 2026 LMZ740-741-200400- /O.EXP.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/ /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... ...PREVIOUS SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ742-200400- /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Northerly Island to Calumet Harbor IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Northerly Island to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-200400- /O.NEW.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-200400- /O.NEW.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: New Issued At: 2026-09-19 14:56:24 025 WHUS73 KLOT 191956 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 256 PM CDT Sat Sep 19 2026 LMZ740-741-200400- /O.EXP.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/ /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... ...PREVIOUS SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ742-200400- /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Northerly Island to Calumet Harbor IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Northerly Island to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-200400- /O.NEW.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-200400- /O.NEW.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: New Issued At: 2026-09-19 14:56:24 025 WHUS73 KLOT 191956 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 256 PM CDT Sat Sep 19 2026 LMZ740-741-200400- /O.EXP.KLOT.SC.Y.0082.000000T0000Z-260919T2000Z/ /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... ...PREVIOUS SMALL CRAFT ADVISORY WILL EXPIRE AT 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ742-200400- /O.NEW.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Northerly Island to Calumet Harbor IL- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Northerly Island to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-200400- /O.NEW.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-200400- /O.NEW.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 256 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-19 21:57:39 125 WHUS73 KLOT 200257 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 957 PM CDT Sat Sep 19 2026 LMZ740>742-201100- /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island, IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-201100- /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-201100- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-19 21:57:39 125 WHUS73 KLOT 200257 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 957 PM CDT Sat Sep 19 2026 LMZ740>742-201100- /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island, IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-201100- /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-201100- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-19 21:57:39 125 WHUS73 KLOT 200257 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 957 PM CDT Sat Sep 19 2026 LMZ740>742-201100- /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Northerly Island, IL. * WHEN...From 7 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-201100- /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...From 10 AM Sunday to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-201100- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 957 PM CDT Sat Sep 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM SUNDAY TO 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...From 1 PM Sunday to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 00:07:39 205 WHUS73 KLOT 200507 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1207 AM CDT Sun Sep 20 2026 LMZ740>742-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 00:07:39 205 WHUS73 KLOT 200507 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1207 AM CDT Sun Sep 20 2026 LMZ740>742-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 00:07:39 205 WHUS73 KLOT 200507 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1207 AM CDT Sun Sep 20 2026 LMZ740>742-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201315- /O.NEW.KLOT.MF.Y.0014.260920T0507Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1207 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 03:10:27 359 WHUS73 KLOT 200809 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 309 AM CDT Sun Sep 20 2026 LMZ740>742-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 03:10:27 359 WHUS73 KLOT 200809 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 309 AM CDT Sun Sep 20 2026 LMZ740>742-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 03:10:27 359 WHUS73 KLOT 200809 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 309 AM CDT Sun Sep 20 2026 LMZ740>742-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1200Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 7 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743-744-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1500Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 10 AM this morning to 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ745-201615- /O.CON.KLOT.MF.Y.0014.000000T0000Z-260920T1400Z/ /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 309 AM CDT Sun Sep 20 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 AM CDT MONDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to one quarter mile or less. For the Small Craft Advisory, northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Small Craft Advisory, from 1 PM this afternoon to 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ Action: Continued Issued At: 2026-09-20 10:22:49 738 WHUS73 KLOT 201522 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1022 AM CDT Sun Sep 20 2026 LMZ740>742-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-202330- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 10:22:49 738 WHUS73 KLOT 201522 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1022 AM CDT Sun Sep 20 2026 LMZ740>742-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-202330- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 10:22:49 738 WHUS73 KLOT 201522 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1022 AM CDT Sun Sep 20 2026 LMZ740>742-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 10 ft occasionally to 13 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-202330- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T0000Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-202330- /O.CON.KLOT.SC.Y.0083.260920T1800Z-260921T1200Z/ Burns Harbor to Michigan City IN- 1022 AM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-20 14:52:59 554 WHUS73 KLOT 201952 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 252 PM CDT Sun Sep 20 2026 LMZ740>742-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-210400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 14:52:59 554 WHUS73 KLOT 201952 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 252 PM CDT Sun Sep 20 2026 LMZ740>742-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-210400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-20 14:52:59 554 WHUS73 KLOT 201952 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 252 PM CDT Sun Sep 20 2026 LMZ740>742-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-210400- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-210400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 252 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 21:32:39 465 WHUS73 KLOT 210232 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 932 PM CDT Sun Sep 20 2026 LMZ740>742-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 21:32:39 465 WHUS73 KLOT 210232 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 932 PM CDT Sun Sep 20 2026 LMZ740>742-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-20 21:32:39 465 WHUS73 KLOT 210232 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 932 PM CDT Sun Sep 20 2026 LMZ740>742-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ745-211045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260921T1200Z/ Burns Harbor to Michigan City IN- 932 PM CDT Sun Sep 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT MONDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 7 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-21 03:15:49 737 WHUS73 KLOT 210815 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 315 AM CDT Mon Sep 21 2026 LMZ745-211500- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T1500Z/ Burns Harbor to Michigan City IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 03:15:49 737 WHUS73 KLOT 210815 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 315 AM CDT Mon Sep 21 2026 LMZ745-211500- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T1500Z/ Burns Harbor to Michigan City IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 03:15:49 737 WHUS73 KLOT 210815 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 315 AM CDT Mon Sep 21 2026 LMZ745-211500- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T1500Z/ Burns Harbor to Michigan City IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-211615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 315 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 10:15:47 370 WHUS73 KLOT 211515 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1015 AM CDT Mon Sep 21 2026 LMZ745-212000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T2000Z/ Burns Harbor to Michigan City IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 3 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 10:15:47 370 WHUS73 KLOT 211515 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1015 AM CDT Mon Sep 21 2026 LMZ745-212000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T2000Z/ Burns Harbor to Michigan City IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 3 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-21 10:15:47 370 WHUS73 KLOT 211515 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1015 AM CDT Mon Sep 21 2026 LMZ745-212000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260921T2000Z/ Burns Harbor to Michigan City IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 3 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 30 kt and significant waves to 9 ft occasionally to 12 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-212315- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1015 AM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 13:49:55 683 WHUS73 KLOT 211849 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 149 PM CDT Mon Sep 21 2026 LMZ745-220000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0000Z/ Burns Harbor to Michigan City IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-21 13:49:55 683 WHUS73 KLOT 211849 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 149 PM CDT Mon Sep 21 2026 LMZ745-220000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0000Z/ Burns Harbor to Michigan City IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 13:49:55 683 WHUS73 KLOT 211849 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 149 PM CDT Mon Sep 21 2026 LMZ745-220000- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0000Z/ Burns Harbor to Michigan City IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City IN. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 149 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-21 18:49:22 477 WHUS73 KLOT 212348 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 648 PM CDT Mon Sep 21 2026 LMZ745-220300- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 18:49:22 477 WHUS73 KLOT 212348 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 648 PM CDT Mon Sep 21 2026 LMZ745-220300- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 18:49:22 477 WHUS73 KLOT 212348 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 648 PM CDT Mon Sep 21 2026 LMZ745-220300- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Burns Harbor to Michigan City, IN. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-220800- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 648 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Expired Issued At: 2026-09-21 22:00:31 167 WHUS73 KLOT 220259 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 959 PM CDT Mon Sep 21 2026 LMZ745-220400- /O.EXP.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... Winds and waves have subsided below advisory criteria. $$ LMZ740>742-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 22:00:31 167 WHUS73 KLOT 220259 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 959 PM CDT Mon Sep 21 2026 LMZ745-220400- /O.EXP.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... Winds and waves have subsided below advisory criteria. $$ LMZ740>742-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-21 22:00:31 167 WHUS73 KLOT 220259 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 959 PM CDT Mon Sep 21 2026 LMZ745-220400- /O.EXP.KLOT.SC.Y.0083.000000T0000Z-260922T0300Z/ Burns Harbor to Michigan City IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM CDT THIS EVENING... Winds and waves have subsided below advisory criteria. $$ LMZ740>742-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-221100- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 959 PM CDT Mon Sep 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 02:56:11 719 WHUS73 KLOT 220755 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 255 AM CDT Tue Sep 22 2026 LMZ740>742-221600- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 255 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-221600- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 255 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 02:56:11 719 WHUS73 KLOT 220755 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 255 AM CDT Tue Sep 22 2026 LMZ740>742-221600- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 255 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor, IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-221600- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 255 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor, IL to Burns Harbor, IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 10:01:18 619 WHUS73 KLOT 221500 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CDT Tue Sep 22 2026 LMZ740>742-222300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1000 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-222300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1000 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 10:01:18 619 WHUS73 KLOT 221500 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CDT Tue Sep 22 2026 LMZ740>742-222300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1000 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-222300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 1000 AM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 14:47:28 912 WHUS73 KLOT 221946 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 246 PM CDT Tue Sep 22 2026 LMZ740>742-230400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 246 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-230400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 246 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 14:47:28 912 WHUS73 KLOT 221946 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 246 PM CDT Tue Sep 22 2026 LMZ740>742-230400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0000Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 246 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-230400- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 246 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-09-22 21:45:13 830 WHUS73 KLOT 230244 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 944 PM CDT Tue Sep 22 2026 LMZ740>742-231045- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 944 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-231045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 944 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-22 21:45:13 830 WHUS73 KLOT 230244 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 944 PM CDT Tue Sep 22 2026 LMZ740>742-231045- /O.EXT.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 944 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-231045- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 944 PM CDT Tue Sep 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-23 03:11:52 392 WHUS73 KLOT 230811 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 311 AM CDT Wed Sep 23 2026 LMZ740>742-231615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 311 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-231500- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 311 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-23 03:11:52 392 WHUS73 KLOT 230811 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 311 AM CDT Wed Sep 23 2026 LMZ740>742-231615- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 311 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743-744-231500- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 311 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Burns Harbor IN. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-23 09:55:45 310 WHUS73 KLOT 231455 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 955 AM CDT Wed Sep 23 2026 LMZ743-744-231600- /O.EXP.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 955 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 AM CDT THIS MORNING... Waves have started to subside below Small Craft criteria and will continue to do so through the afternoon. However, 2 to 4 ft waves will persist along the Indiana nearshore leading to choppy boating conditions. $$ LMZ740>742-232300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 955 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Significant waves 4 to 6 ft occasionally to 8 ft ongoing. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Expired Issued At: 2026-09-23 09:55:45 310 WHUS73 KLOT 231455 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 955 AM CDT Wed Sep 23 2026 LMZ743-744-231600- /O.EXP.KLOT.SC.Y.0083.000000T0000Z-260923T1500Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- 955 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 AM CDT THIS MORNING... Waves have started to subside below Small Craft criteria and will continue to do so through the afternoon. However, 2 to 4 ft waves will persist along the Indiana nearshore leading to choppy boating conditions. $$ LMZ740>742-232300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 955 AM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Significant waves 4 to 6 ft occasionally to 8 ft ongoing. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-09-23 14:40:52 125 WHUS73 KLOT 231940 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 240 PM CDT Wed Sep 23 2026 LMZ740>742-240300- /O.CON.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 240 PM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...Significant waves to 4 to 6 ft occasionally to 8 ft occurring. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Cancelled Issued At: 2026-09-23 21:35:01 869 WHUS73 KLOT 240234 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 934 PM CDT Wed Sep 23 2026 LMZ740>742-240345- /O.CAN.KLOT.SC.Y.0083.000000T0000Z-260924T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 934 PM CDT Wed Sep 23 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... Winds and waves have fallen below Small Craft Advisory criteria. $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||