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: 312 AM CDT Mon Mar 31 2025




Today: Northwest winds 20 to 25 kt becoming north. Mostly cloudy. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.

Tonight: Northeast winds 10 to 20 kt. Mostly clear. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

Tuesday: East winds 10 to 15 kt. Mostly sunny in the morning, then becoming mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft.

Tuesday Night: East winds 20 to 25 kt. Slight chance of showers in the evening, then showers with thunderstorms likely overnight. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. A small craft advisory will likely be needed.







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

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