Snowy, Very Cold and Windy from the Northern Plains to Great Lakes; Critical Fire Weather in South Texas

Moderate to heavy lake effect snow is expected downwind of the Great Lakes, with the Chicago metro potentially receiving 6 to 12 inches of snowfall. A frigid airmass will bring very cold temperatures to the Central U.S. and Mississippi Valley today, migrating into the Eastern U.S. on Monday. Dry and windy weather will bring critical fire weather conditions to South Texas today. Read More >

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: 334 PM CST Sun Nov 9 2025




Tonight: Northwest gales to 35 kt becoming northeast late. Thundersnow with a chance of waterspouts. Waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft occasionally to 16 ft.

Monday: North winds to 30 kt becoming northwest. Chance of waterspouts. Snow showers and slight chance of thunderstorms in the morning, then chance of snow and showers in the afternoon. Waves 7 to 10 ft occasionally to 13 ft.

Monday Night: Northwest winds to 30 kt becoming west 15 to 25 kt overnight. Chance of snow showers and slight chance of rain in the evening. Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft occasionally to 12 ft.

Tuesday: Southwest winds 15 to 25 kt increasing to 30 kt. Chance of snow in the morning. Waves 3 to 5 ft.







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

Visit your local NWS office at: https://www.weather.gov/lot