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Home Return to list Small Craft Advisory 0060 Issued by the Chicago Forecast Office
Action: New Issued At: 2026-05-19 15:00:59 939 WHUS73 KLOT 192000 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 300 PM CDT Tue May 19 2026 LMZ740>742-200400- /O.CAN.KLOT.SC.Y.0059.000000T0000Z-260519T2100Z/ /O.NEW.KLOT.SC.Y.0060.260520T1500Z-260521T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 300 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-200400- /O.CAN.KLOT.SC.Y.0059.000000T0000Z-260519T2100Z/ /O.NEW.KLOT.SC.Y.0060.260520T1200Z-260521T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 300 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: New Issued At: 2026-05-19 15:00:59 939 WHUS73 KLOT 192000 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 300 PM CDT Tue May 19 2026 LMZ740>742-200400- /O.CAN.KLOT.SC.Y.0059.000000T0000Z-260519T2100Z/ /O.NEW.KLOT.SC.Y.0060.260520T1500Z-260521T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 300 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-200400- /O.CAN.KLOT.SC.Y.0059.000000T0000Z-260519T2100Z/ /O.NEW.KLOT.SC.Y.0060.260520T1200Z-260521T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 300 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-19 21:47:43 396 WHUS73 KLOT 200247 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 947 PM CDT Tue May 19 2026 LMZ740>742-201100- /O.CON.KLOT.SC.Y.0060.260520T1500Z-260521T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 947 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-201100- /O.CON.KLOT.SC.Y.0060.260520T1200Z-260521T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 947 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-19 21:47:43 396 WHUS73 KLOT 200247 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 947 PM CDT Tue May 19 2026 LMZ740>742-201100- /O.CON.KLOT.SC.Y.0060.260520T1500Z-260521T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 947 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-201100- /O.CON.KLOT.SC.Y.0060.260520T1200Z-260521T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 947 PM CDT Tue May 19 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 AM WEDNESDAY TO 4 AM CDT THURSDAY... * WHAT...North to northeast winds to 25 kt and significant waves to 7 ft occasionally to 9 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM Wednesday to 4 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 09:03:16 151 WHUS73 KLOT 201402 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 902 AM CDT Wed May 20 2026 LMZ740>742-202215- /O.CON.KLOT.SC.Y.0060.260520T1500Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 902 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM this morning to 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-202215- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 902 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM this morning to 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 09:03:16 151 WHUS73 KLOT 201402 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 902 AM CDT Wed May 20 2026 LMZ740>742-202215- /O.CON.KLOT.SC.Y.0060.260520T1500Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 902 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...From 10 AM this morning to 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-202215- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 902 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 7 AM this morning to 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 14:20:56 305 WHUS73 KLOT 201920 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 220 PM CDT Wed May 20 2026 LMZ740>742-210330- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 220 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-210330- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 220 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 14:20:56 305 WHUS73 KLOT 201920 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 220 PM CDT Wed May 20 2026 LMZ740>742-210330- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 220 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-210330- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 220 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 21:34:12 043 WHUS73 KLOT 210233 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 933 PM CDT Wed May 20 2026 LMZ740>742-211045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 933 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-211045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 933 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-20 21:34:12 043 WHUS73 KLOT 210233 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 933 PM CDT Wed May 20 2026 LMZ740>742-211045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 933 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THURSDAY... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-211045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 933 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THURSDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 03:07:35 621 WHUS73 KLOT 210807 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 307 AM CDT Thu May 21 2026 LMZ740>742-211615- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 307 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-211200- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 307 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 03:07:35 621 WHUS73 KLOT 210807 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 307 AM CDT Thu May 21 2026 LMZ740>742-211615- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 307 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * 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 1 PM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-211200- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 307 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 7 AM CDT Thursday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 06:57:40 839 WHUS73 KLOT 211157 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 657 AM CDT Thu May 21 2026 LMZ743>745-211300- /O.EXP.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 657 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING... Winds and waves have diminished below criteria. Therefore, the advisory will be allowed to expire. $$ LMZ740>742-211800- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 657 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft occurring. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Expired Issued At: 2026-05-21 06:57:40 839 WHUS73 KLOT 211157 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 657 AM CDT Thu May 21 2026 LMZ743>745-211300- /O.EXP.KLOT.SC.Y.0060.000000T0000Z-260521T1200Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 657 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 7 AM CDT THIS MORNING... Winds and waves have diminished below criteria. Therefore, the advisory will be allowed to expire. $$ LMZ740>742-211800- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260521T1800Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 657 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft occurring. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-05-21 10:16:49 869 WHUS73 KLOT 211516 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1016 AM CDT Thu May 21 2026 LMZ743>745-212330- /O.EXB.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1016 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-212330- /O.EXT.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1016 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT SATURDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time and Area Extended Issued At: 2026-05-21 10:16:49 869 WHUS73 KLOT 211516 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1016 AM CDT Thu May 21 2026 LMZ743>745-212330- /O.EXB.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1016 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ740>742-212330- /O.EXT.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1016 AM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM CDT SATURDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 10 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 15:14:31 475 WHUS73 KLOT 212013 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 313 PM CDT Thu May 21 2026 LMZ740>742-220415- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 313 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT SATURDAY... * 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 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-220415- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 313 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 15:14:31 475 WHUS73 KLOT 212013 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 313 PM CDT Thu May 21 2026 LMZ740>742-220415- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 313 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT SATURDAY... * 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 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-220415- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 313 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 21:39:16 596 WHUS73 KLOT 220238 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 938 PM CDT Thu May 21 2026 LMZ740>742-221045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 938 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT SATURDAY... * 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 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-220900- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 938 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-21 21:39:16 596 WHUS73 KLOT 220238 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 938 PM CDT Thu May 21 2026 LMZ740>742-221045- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 938 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT SATURDAY... * 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 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-220900- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 938 PM CDT Thu May 21 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Significant waves to 6 ft occasionally to 8 ft. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Time Extended Issued At: 2026-05-22 03:44:04 240 WHUS73 KLOT 220843 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 343 AM CDT Fri May 22 2026 LMZ743>745-220945- /O.EXP.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 343 AM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING... Winds and waves have subsided allowing the advisory to expire. $$ LMZ740>742-221645- /O.EXT.KLOT.SC.Y.0060.000000T0000Z-260523T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 343 AM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM CDT SATURDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Expired Issued At: 2026-05-22 03:44:04 240 WHUS73 KLOT 220843 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 343 AM CDT Fri May 22 2026 LMZ743>745-220945- /O.EXP.KLOT.SC.Y.0060.000000T0000Z-260522T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 343 AM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 AM CDT EARLY THIS MORNING... Winds and waves have subsided allowing the advisory to expire. $$ LMZ740>742-221645- /O.EXT.KLOT.SC.Y.0060.000000T0000Z-260523T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 343 AM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM CDT SATURDAY... * WHAT...Northeast winds to 25 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-22 09:29:45 071 WHUS73 KLOT 221429 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 929 AM CDT Fri May 22 2026 LMZ740>742-222230- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 929 AM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT SATURDAY... * 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 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Continued Issued At: 2026-05-22 14:52:27 234 WHUS73 KLOT 221952 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 252 PM CDT Fri May 22 2026 LMZ740>742-230400- /O.CON.KLOT.SC.Y.0060.000000T0000Z-260523T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 252 PM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT SATURDAY... * WHAT...Northeast winds to 20 kt and significant waves to 6 ft occasionally to 8 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Action: Cancelled Issued At: 2026-05-22 21:19:41 158 WHUS73 KLOT 230219 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 919 PM CDT Fri May 22 2026 LMZ740>742-230330- /O.CAN.KLOT.SC.Y.0060.000000T0000Z-260523T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 919 PM CDT Fri May 22 2026 ...SMALL CRAFT ADVISORY IS CANCELLED... Winds and waves are expected to remain below criteria. The Small Craft Advisory is cancelled. $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||