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Home Return to list Gale Watch 0022 Issued by the Chicago Forecast Office
Action: New Issued At: 2025-12-17 03:00:10 519 WHUS73 KLOT 170859 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 259 AM CST Wed Dec 17 2025 LMZ740>743-171700- /O.EXP.KLOT.SC.Y.0114.000000T0000Z-251217T0900Z/ /O.NEW.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.NEW.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 259 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 6 ft occasionally to 8 ft possible. * WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet Harbor IL to Gary IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LMZ744-745-171700- /O.EXP.KLOT.SC.Y.0114.000000T0000Z-251217T0900Z/ /O.NEW.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.NEW.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 259 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 9 ft occasionally to 12 ft possible. * WHERE...Gary to Michigan City IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ Action: New Issued At: 2025-12-17 03:00:10 519 WHUS73 KLOT 170859 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 259 AM CST Wed Dec 17 2025 LMZ740>743-171700- /O.EXP.KLOT.SC.Y.0114.000000T0000Z-251217T0900Z/ /O.NEW.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.NEW.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 259 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 6 ft occasionally to 8 ft possible. * WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet Harbor IL to Gary IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LMZ744-745-171700- /O.EXP.KLOT.SC.Y.0114.000000T0000Z-251217T0900Z/ /O.NEW.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.NEW.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 259 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 9 ft occasionally to 12 ft possible. * WHERE...Gary to Michigan City IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ Action: Continued Issued At: 2025-12-17 10:01:15 992 WHUS73 KLOT 171600 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CST Wed Dec 17 2025 LMZ740>743-180000- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.CON.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 1000 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 6 ft occasionally to 8 ft possible. * WHERE...Winthrop Harbor to Calumet Harbor, IL, and Calumet Harbor, IL to Gary, IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LMZ744-745-180000- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.CON.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 1000 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 9 ft occasionally to 12 ft possible. * WHERE...Gary to Michigan City, IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ Action: Continued Issued At: 2025-12-17 10:01:15 992 WHUS73 KLOT 171600 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CST Wed Dec 17 2025 LMZ740>743-180000- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.CON.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 1000 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 6 ft occasionally to 8 ft possible. * WHERE...Winthrop Harbor to Calumet Harbor, IL, and Calumet Harbor, IL to Gary, IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ LMZ744-745-180000- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.CON.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 1000 AM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH LATE THURSDAY NIGHT... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Watch, west gales to 35 kt and significant waves to 9 ft occasionally to 12 ft possible. * WHERE...Gary to Michigan City, IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Watch, from Thursday evening through late Thursday night. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and waves. && $$ Action: Upgraded Issued At: 2025-12-17 15:00:52 065 WHUS73 KLOT 172100 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 300 PM CST Wed Dec 17 2025 LMZ740>743-180500- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.UPG.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ /O.NEW.KLOT.GL.W.0032.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 300 PM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WARNING IN EFFECT FROM 6 PM THURSDAY TO 6 AM CST FRIDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Warning, west winds to 35 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet Harbor IL to Gary IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Warning, from 6 PM Thursday to 6 AM CST Friday. * 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. && $$ LMZ744-745-180500- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.UPG.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ /O.NEW.KLOT.GL.W.0032.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 300 PM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WARNING IN EFFECT FROM 6 PM THURSDAY TO 6 AM CST FRIDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Warning, west winds to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Gary to Michigan City IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Warning, from 6 PM Thursday to 6 AM CST Friday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ Action: Upgraded Issued At: 2025-12-17 15:00:52 065 WHUS73 KLOT 172100 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 300 PM CST Wed Dec 17 2025 LMZ740>743-180500- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.UPG.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ /O.NEW.KLOT.GL.W.0032.251219T0000Z-251219T1200Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN- 300 PM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WARNING IN EFFECT FROM 6 PM THURSDAY TO 6 AM CST FRIDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 6 ft occasionally to 8 ft expected. For the Gale Warning, west winds to 35 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL, and Calumet Harbor IL to Gary IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Warning, from 6 PM Thursday to 6 AM CST Friday. * 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. && $$ LMZ744-745-180500- /O.CON.KLOT.SC.Y.0115.251218T0300Z-251219T0000Z/ /O.UPG.KLOT.GL.A.0022.251219T0000Z-251219T1200Z/ /O.NEW.KLOT.GL.W.0032.251219T0000Z-251219T1200Z/ Gary to Burns Harbor IN-Burns Harbor to Michigan City IN- 300 PM CST Wed Dec 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 6 PM CST THURSDAY... ...GALE WARNING IN EFFECT FROM 6 PM THURSDAY TO 6 AM CST FRIDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt and significant waves to 5 ft expected. For the Gale Warning, west winds to 35 kt and significant waves to 10 ft occasionally to 13 ft expected. * WHERE...Gary to Michigan City IN. * WHEN...For the Small Craft Advisory, from 9 PM this evening to 6 PM CST Thursday. For the Gale Warning, from 6 PM Thursday to 6 AM CST Friday. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||