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Home Return to list Small Craft Advisory 0032 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-03-21 09:18:45 150 WHUS73 KLOT 211418 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 918 AM CDT Sat Mar 21 2026 LMZ740>742-212230- /O.NEW.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 918 AM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-212230- /O.NEW.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 918 AM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: New Issued At: 2026-03-21 09:18:45 150 WHUS73 KLOT 211418 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 918 AM CDT Sat Mar 21 2026 LMZ740>742-212230- /O.NEW.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 918 AM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-212230- /O.NEW.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 918 AM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-21 14:50:56 298 WHUS73 KLOT 211950 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 250 PM CDT Sat Mar 21 2026 LMZ740>742-220400- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 250 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-220400- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 250 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-21 14:50:56 298 WHUS73 KLOT 211950 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 250 PM CDT Sat Mar 21 2026 LMZ740>742-220400- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 250 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-220400- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 250 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-21 21:37:09 510 WHUS73 KLOT 220236 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 936 PM CDT Sat Mar 21 2026 LMZ740>742-221045- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 936 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-221045- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 936 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-21 21:37:09 510 WHUS73 KLOT 220236 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 936 PM CDT Sat Mar 21 2026 LMZ740>742-221045- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 936 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM SUNDAY TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM Sunday to 1 PM 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. && $$ LMZ743>745-221045- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 936 PM CDT Sat Mar 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM SUNDAY TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt with a few gale force gusts to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM Sunday to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-22 03:32:03 921 WHUS73 KLOT 220831 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 331 AM CDT Sun Mar 22 2026 LMZ740>742-221645- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 331 AM CDT Sun Mar 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt expected, with occasional gales to 35 kt this afternoon and evening. Significant waves to 11 ft occasionally to 14 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM this morning to 1 PM 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. && $$ LMZ743>745-221645- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 331 AM CDT Sun Mar 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt expected, with occasional gales to 35 kt this afternoon and evening. Significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM this morning to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-03-22 03:32:03 921 WHUS73 KLOT 220831 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 331 AM CDT Sun Mar 22 2026 LMZ740>742-221645- /O.CON.KLOT.SC.Y.0032.260322T1200Z-260323T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 331 AM CDT Sun Mar 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 1 PM CDT MONDAY... * WHAT...North winds to 30 kt expected, with occasional gales to 35 kt this afternoon and evening. Significant waves to 11 ft occasionally to 14 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 7 AM this morning to 1 PM 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. && $$ LMZ743>745-221645- /O.CON.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 331 AM CDT Sun Mar 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 4 PM CDT MONDAY... * WHAT...North winds to 30 kt expected, with occasional gales to 35 kt this afternoon and evening. Significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 10 AM this morning to 4 PM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Upgraded Issued At: 2026-03-22 07:19:11 029 WHUS73 KLOT 221218 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 718 AM CDT Sun Mar 22 2026 LMZ740>742-230000- /O.UPG.KLOT.SC.Y.0032.000000T0000Z-260323T1800Z/ /O.NEW.KLOT.GL.W.0015.260322T1218Z-260323T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 718 AM CDT Sun Mar 22 2026 ...GALE WARNING IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...North gales to 35 kt and significant waves to 11 ft occasionally to 14 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LMZ743>745-230000- /O.UPG.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ /O.NEW.KLOT.GL.W.0015.260322T1600Z-260323T0300Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 718 AM CDT Sun Mar 22 2026 ...GALE WARNING IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT THIS EVENING... * WHAT...North gales to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 11 AM this morning to 10 PM CDT this evening. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ Action: Upgraded Issued At: 2026-03-22 07:19:11 029 WHUS73 KLOT 221218 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 718 AM CDT Sun Mar 22 2026 LMZ740>742-230000- /O.UPG.KLOT.SC.Y.0032.000000T0000Z-260323T1800Z/ /O.NEW.KLOT.GL.W.0015.260322T1218Z-260323T0300Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 718 AM CDT Sun Mar 22 2026 ...GALE WARNING IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...North gales to 35 kt and significant waves to 11 ft occasionally to 14 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 PM CDT this evening. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ LMZ743>745-230000- /O.UPG.KLOT.SC.Y.0032.260322T1500Z-260323T2100Z/ /O.NEW.KLOT.GL.W.0015.260322T1600Z-260323T0300Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 718 AM CDT Sun Mar 22 2026 ...GALE WARNING IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT THIS EVENING... * WHAT...North gales to 35 kt and significant waves to 12 ft occasionally to 16 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 11 AM this morning to 10 PM CDT this evening. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||