Coastal Waters Forecast for Calumet Harbor IL to Gary IN (LMZ743) (Text-Only)
NWS Forecast for: Calumet Harbor IL to Gary IN (LMZ743)
Issued by: National Weather Service Chicago, IL
Last Update: 603 PM CDT Thu Apr 16 2026




Tonight: Variable winds less than 10 kt becoming southeast at 10 kt toward daybreak friday. Dense fog. Waves 1 to 2 ft.

Friday: Southeast winds 10 to 15 kt becoming south and increasing to 15 to 25 kt. Areas of dense fog in the morning. Waves 1 to 3 ft.

Friday Night: South winds 20 to 25 kt becoming southwest 15 to 20 kt overnight. Showers with thunderstorms likely in the evening, then showers and a chance of thunderstorms overnight. Waves 2 to 4 ft.

Saturday: West winds 15 to 25 kt. Chance of showers in the morning. Waves 2 to 4 ft.







Zone Forecast: Calumet Harbor IL to Gary IN (LMZ743)

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