A drastic change weatherwise is to take shape across the Chicago area over the next 24 hours. Winter is set to return to the region after a day of heavy rainfall and thunderstorms fueled by record-breaking warmth. The storm system that produced today's thunderstorms and heavy rainfall will continue to lift northeast out of the region. On Wednesday, Chicago will be on the backside (or cool side) of the storm system. Temperatures will start off in the 40s on Wednesday and plunge into the 20s and teens in the evening with rain changing over to snow from west to east. Snow is expected to accumulate but on the light side with the heaviest accumulations occurring northwest across north-central Illinois. Anywhere from a dusting to 2 inches is expected on Wednesday over northeast and north-central Illinois. Blustery conditions will make it feel even colder. The arctic chill really settles over the region from Wednesday night through Friday night. High temperatures Thursday and Friday will only make it in the teens with overnight lows in the single digits and wind chill values below zero. Friday night into Saturday, a clipper system could bring another batch of light snow into the region.
Wednesday: Partly cloudy with falling temperatures. Rain changing to snow. Highs in the lower to mid 40s. Winds northwest 10-20 mph.
Thursday: Mostly sunny and cold. Highs in the mid teens. Winds northwest 5-15 mph.
Friday: Mostly sunny and cold. Clouds increase at night with the chance for light snow. Highs in the upper teens to lower 20s. Winds northwest 5-15 mph.
Saturday: Partly cloudy with the chance for light snow early. Highs in the mid 20s. Winds northwest 5-15 mph.
Sunday: Mostly sunny and cool. Highs in the lower 30s. Winds northwest 5-10 mph.
Monday: Partly cloudy and warmer. Highs in the mid 30s. Winds west 5-15 mph.
Tuesday: Partly cloudy and cooler. Highs in the lower 30s. Winds northwest 5-15 mph.
8-15 day temperature trend outlook
Wednesday Feb. 6: Highs in the 40s.
Thursday Feb. 7: Highs in the 40s.
Friday Feb. 8: Highs in the 40s.
Saturday Feb. 9: Highs in the 30s.
Sunday Feb. 10: Highs in the 30s.
Monday Feb. 11: Highs in the 30s/40s.
Tuesday Feb. 12: Highs in the 40s.
Wednesday Feb. 13: Highs in the 40s.
Thursday Feb. 14: Highs in the 20s.
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