Last Update: 604 PM CDT Sun Mar 15 2026

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Chicago, IL Local Forecast Office

7NM NNW Gary IN

Marine Zone Forecast

Tonight
Northwest winds to 30 kt becoming west and increasing to 40 kt gales. Rain and slight chance of thunderstorms in the evening, then chance of rain and snow after midnight. Some thunderstorms may be severe with damaging winds. Waves 3 to 5 ft building to 8 to 12 ft occasionally to 16 ft.
Monday
Northwest gales to 40 kt. Snow. Waves 12 to 16 ft occasionally to 21 ft.
Monday Night
Northwest gales to 35 kt diminishing to 30 kt. Chance of snow in the evening, then chance of snow showers overnight. Waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft occasionally to 16 ft.
Tuesday
Northwest winds 15 to 25 kt becoming west 10 to 20 kt. Freezing spray in the morning. Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.



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604 PM CDT Sun Mar 15 2026
 
 

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