Adam here filling in for Jeff with your Northern Illinois 5-day forecast.
Tomorrow (Wednesday) will be a day of changes. We will see winds shift to southwesterly direction as our incoming weather maker begins to organize in the plains. This will advect milder air into the region and many locations should see temps creeping just above freezing if the snowpack doesn’t hold them down too much. In addition to milder temps, dewpoints will be on the increase as moisture is advected into the region.
This type of moisture increase on top of a thick snowpack will likely lead to the development of fog across the area, so we’ll have to stay tuned for potential advisories if it gets too bad. Thursday will feature a chance for light rain across all of northern Illinois. Rainfall amounts themselves won’t be too impressive, but coupled with a melting snowpack will make for a sloppy, sloshy day and may create some minor flooding issues. The heaviest rains from this system will target downstate where there is no snowpack. It IS possible to see a rain/snow mix on the backside of the system but right now we don’t see any real potential for any accumulation.
As the system departs Friday into the weekend we’ll see a return to colder temperatures and sunny skies for Friday/Saturday. Clouds return Sunday as another weak system moves in with a chance for light rain later in the afternoon.
Wednesday: 39/38, Sunny, then clouds/fog/drizzle increase late and overnight.
THursday: 44/29 Chance of light rain/fog.
Friday: 27/14 – Sunny, light winds.
Saturday: 35/27 – Sunny, light winds.
Sunday: 40/30 – increasing clouds, chance of light rain.
Wednesday: 34/30 – Sunny, fog/drizzle overnight
Thursday: 33/22 – Fog/Rain early.
Friday: 23/7 – Sunny, light winds
Saturday: 33/17 – Sunny, light winds
Sunday: 38/29 – Increasing clouds, chance of light rain.
Wednesday: 37/31, Sunny, Fog/Drizzle overnight
Thursday: 36/21, Fog/Rain in the morning, gradual clearing.
Friday: 23/11, Sunny, light winds.
Saturady: 39/28: Sunny, light winds
Sunday: 41/31: Mostly cloudy, light winds.