David's Forecast - Mild Sunday Evening, Arctic blast arrives Monday

January is not messin' around anymore

IMPACTS: No concerns to travel for most of the day Sunday, but once the snow arrives, expect road conditions to deteriorate rather quickly.

Ahead of the cold front temperatures will warm into the upper 40s Sunday and upper 50s Monday.

Light snow is possible for the Chicago area throughout Saturday afternoon and evening. The probability of snow accumulation exceeding an inch is very low. This looks to be at least the coldest air we've had this season and possibly the coldest air we've had in years! The long-range forecast shows high temperatures may get above 10-degree is in the Rochester area this weekend, but by next Tuesday the daytime high is only expected to reach zero. Overnight, temperatures will drop to around 5 and wind chills could drop as low at -15 degrees.

Temperatures in central IL bottomed out even lower at the same time, with Rochelle getting down to minus 23.

According to the advisory, brief periods of heavy snow and blowing snow giving reduced visibilities are likely until about mid afternoon. The extended forecast is hinting at even colder temperatures by next week. Thermometers only hit the mid-upper teens for highs for Wednesday and Thursday with light snow chances hanging around. Gusty winds both Wednesday and Thursday will create unsafe wind chills near 20 below zero by Thursday morning!

A Wind Chill Advisory (light-green shading on map below) for unsafe wind chills 20 to 30-below zero is in effect for close-in Chicago and south of Interstate-80 Thursday night into Friday morning.

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