


Marine Weather Message
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
045 WHUS73 KLOT 171501 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1001 AM CDT Thu Jul 17 2025 LMZ740>745-172315- /O.CON.KLOT.SC.Y.0073.000000T0000Z-250718T0900Z/ 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- 1001 AM CDT Thu Jul 17 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT FRIDAY... * WHAT...Significant waves to 7 ft occasionally to 9 ft. * WHERE...Illinois and Indiana nearshore from Winthrop 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. && $$