Arctic Air Plunges into the Great Lakes, Northeast and Mid-Atlantic

Arctic air dropping through the northern and eastern U.S. and a storm off the east coast will bring periods of snow, very cold wind chills and hazardous traveling conditions from the Upper Great Lakes to the Northeast. Meanwhile in southern California, Santa Ana winds will decrease but hot, dry air will remain over the area with elevated fire weather conditions.

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: 254 PM CST Tue Dec 12 2017

Tonight: Northwest winds to 30 kt easing to 15 to 25 kt this evening...then becoming southwest 10 to 20 kt late. Slight chance of snow after midnight. Waves 6 to 9 ft occasionally to 12 ft subsiding to 2 to 4 ft.

Wednesday: South winds to 30 kt becoming southwest 15 to 25 kt in the afternoon. Snow likely through the day. Waves 2 to 4 ft.

Wednesday Night: North winds to 30 kt diminishing to 15 to 25 kt after midnight. Snow likely. Waves 4 to 7 ft occasionally to 9 ft.

Thursday: Northwest winds 10 to 20 kt becoming west 10 to 15 kt in the afternoon. Slight chance of snow in the morning. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the afternoon.

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

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