The coldest winds of the season will hit the Chicago area overnight, with some places dropping to minus 25 degrees Friday morning.
A wind chill advisory is now in effect for several counties in northern Illinois, including McHenry, DeKalb, Kane, LaSalle, Kendall, Will and Kankakee counties. According to the National Weather Service, this advisory will last till 9 am on Friday.
The advisory was issued as the air temperature drops to the low single digits, and the winds will make things feel even cooler.
In fact, air chill in the far western suburbs can drop to minus 25 degrees overnight, and will hardly be warmer than early morning commutes. The far southern suburbs are likely to see similar temperatures, and in downtown Chicago, air chill could still drop to minus 10 degrees.
Such wind chill can cause frostbite to exposed skin in as little as 30 minutes, according to the National Weather Service, and residents are urged to bundle up and spend as little time outdoors as possible.
Winds will be calmer on Friday, but that won’t bring some respite from the cold, as high temperatures are still expected to reach only the mid-teens in most areas.
Although there is some respite in temperatures on the horizon, the high temperatures will slide back into the 30s on Saturday and Sunday. However, this will come at a cost, as mixed showers and showers are expected on Saturday evening.
Once that weather system ends, there will be another day of below-average temperatures to deal with in the Chicago area, as the highs will once again be in the teens on Monday, but then temperatures will slowly begin to warm. , possibly arriving back in the 30s by Wednesday.