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Home Return to list Small Craft Advisory 0058 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-05-17 04:07:35 581 WHUS73 KLOT 170907 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 407 AM CDT Sun May 17 2026 LMZ741>745-171715- /O.NEW.KLOT.SC.Y.0058.260517T1800Z-260518T0300Z/ Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 407 AM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING... * WHAT...South winds to 25 kt expected. * WHERE...Calumet Harbor IL to Michigan City IN, and Wilmette Harbor to Calumet Harbor IL. * WHEN...From 1 PM this afternoon to 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. && $$ Action: Continued Issued At: 2026-05-17 09:17:16 430 WHUS73 KLOT 171416 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 916 AM CDT Sun May 17 2026 LMZ741>745-172230- /O.CON.KLOT.SC.Y.0058.260517T1800Z-260518T0300Z/ Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 916 AM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 10 PM CDT THIS EVENING... * WHAT...South winds to 25 kt expected. * WHERE...Calumet Harbor IL to Michigan City IN, and Wilmette Harbor to Calumet Harbor IL. * WHEN...From 1 PM this afternoon to 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-17 14:36:56 477 WHUS73 KLOT 171936 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 236 PM CDT Sun May 17 2026 LMZ741>745-180300- /O.CON.KLOT.SC.Y.0058.000000T0000Z-260518T0300Z/ Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 236 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING... * WHAT...South winds to 30 kt, with a few 35 kt gales occurring. * WHERE...Calumet Harbor IL to Michigan City IN, and Wilmette 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. && $$ Action: Time Extended Issued At: 2026-05-17 21:52:11 411 WHUS73 KLOT 180251 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 951 PM CDT Sun May 17 2026 LMZ740-180900- /O.EXB.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Winthrop Harbor to Wilmette Harbor IL- 951 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT MONDAY... * WHAT...South winds to 25 kt. * WHERE...Winthrop Harbor to Wilmette Harbor IL. * WHEN...Until 4 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ741>745-180900- /O.EXT.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 951 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM CDT MONDAY... * WHAT...South winds to 25 kt. * WHERE...Calumet Harbor IL to Michigan City IN, and Wilmette Harbor to Calumet Harbor IL. * WHEN...Until 4 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. && $$ Action: Time and Area Extended Issued At: 2026-05-17 21:52:11 411 WHUS73 KLOT 180251 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 951 PM CDT Sun May 17 2026 LMZ740-180900- /O.EXB.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Winthrop Harbor to Wilmette Harbor IL- 951 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT MONDAY... * WHAT...South winds to 25 kt. * WHERE...Winthrop Harbor to Wilmette Harbor IL. * WHEN...Until 4 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ741>745-180900- /O.EXT.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 951 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM CDT MONDAY... * WHAT...South winds to 25 kt. * WHERE...Calumet Harbor IL to Michigan City IN, and Wilmette Harbor to Calumet Harbor IL. * WHEN...Until 4 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. && $$ Action: Expired Issued At: 2026-05-18 03:55:34 656 WHUS73 KLOT 180855 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 355 AM CDT Mon May 18 2026 LMZ740>745-181000- /O.EXP.KLOT.SC.Y.0058.000000T0000Z-260518T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 355 AM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING... Winds have diminished below advisory criteria. Therefore the Small Craft Advisory has been allowed to expire. $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||