Huge differences in temperatures and wind chills across the Chicago area due to  Lake Effect clouds/flurries

Overnight low temperatures recorded at area airports ranged from -15 degrees in far northwestern Freeport to 8 degrees at Midway. At O’Hare – Chicago’s official observing site, the lowest reading was 3 above – we still haven’t observed a negative temperature there so far this winter.  Wind chills ranged from -25 in Freeport and a -24 in Pontiac to 1-degree at Kankakee.

Thickest lake-effect clouds and snow showers were occurring close-in along and just inland of the Lake Michigan shoreline – thinning-out as you moved farther inland. These clouds have had a great impact on temperatures – intercepting long-wave radiational heat loss from the solid snow cover that blankets our area. Coldest temperatures/wind chills occurred under clear skies.

Below is a list of area airport locations minimum temperatures overnight and lowest observed wind chills on hourly observations.

Location/Minimum temp/lowest wind chill

Freeport…-15/-25
Pontiac….-10/-24
Aurora/Sugar Grove….-8/-19
Sterling/Rock Falls….-8/-19
DeKalb….-6/-22
Rochelle….-6/-20
Rockford….-7/-17
Peru/Ottawa….-5/-17
Joliet….-2/-10
Morris/Washburn….-2/-14
DuPage/West Chicago….-1/-16
Kankakee….1/1
Waukegan….2/-12
Romeoville/Lewis Univ….2/-9
Schaumburg…2/-7
O’Hare….3/-12
Lansing…7/-5
Midway….8/-7

Indiana:
Rensselaer….1/-6
Michigan City…3/-8
Valparaiso….4/-6
Gary….9/-1

Wisconsin:
Burlington…-14/-24
Janesville….-9/-19
Kenosha….-1/-13
Milwaukeee….4/-9

 

 

 

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.