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Chicago, IL Local Forecast Office

20NM NNE Gary IN

Marine Zone Forecast

Tonight

Southwest winds 10 to 20 kt increasing to gales to 35 kt. Slight chance of rain. Waves 1 to 2 ft building to 10 to 14 ft occasionally to 18 ft.

Wednesday

Southwest gales to 45 kt becoming west late in the morning, then increasing to storm force winds to 50 kt early in the afternoon becoming northwest storm force winds to 55 kt late. Rain likely in the morning, then snow and slight chance of rain in the afternoon. Waves 12 to 16 ft occasionally to 21 ft building to 20 to 25 ft occasionally to 33 ft.

Wednesday Night

Northwest storm force winds to 55 kt diminishing to gales to 45 kt. Chance of snow. Waves 25 to 30 ft occasionally to 39 ft subsiding to 18 to 23 ft occasionally to 30 ft.

Thursday

Northwest gales to 45 kt diminishing to gales to 40 kt. Chance of snow. Waves 15 to 20 ft occasionally to 26 ft subsiding to 14 to 18 ft occasionally to 23 ft.

Thursday Night

Northwest gales to 40 kt diminishing to 30 kt overnight. Chance of snow. Waves 14 to 18 ft occasionally to 23 ft.

Friday

Northwest winds to 30 kt diminishing to 15 to 25 kt. Chance of snow in the morning. Waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft occasionally to 12 ft.

Friday Night

West winds 10 to 15 kt becoming southwest. Chance of snow. Waves 3 to 5 ft subsiding to 1 to 3 ft.

Saturday

South winds 15 to 25 kt increasing to 30 kt. Snow. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.

Sunday

Northwest winds 15 to 25 kt increasing to 30 kt. Chance of rain and snow. Waves 6 to 9 ft occasionally to 12 ft.