Excessive heat warning in place for all of northern Illinois

For the third straight day, temperatures and heat indices increase at the Rockford Airport. This left high temperatures in the lower to mid 90s, and heat index values as high as 108°. 

 

 

 

Unfortunately, things look to remain hot and humid as we jump into Tuesday. Thus, the National Weather Service converted yesterday's excessive heat watch to an excessive heat warning. This is for the entire area and will be in place from 12-10PM. 

Expect high temperatures in the mid 90, with heat indices registering as high as 115°. Again, steps to ensure safety from the heat include taking frequent breaks in the shade or A/C, wearing light colored clothing, and stay hydrated. Pet and child safety needs to be a high priority as well. Make sure they are not unattended outside or left inside of a vehicle. Now, we'll have monitor any outflow boundaries produced by nearby storm complexes.

Two are shown sliding into northern Illinois, one around sunrise and then another sometime during the afternoon. The boundary slated for this afternoon may not only limit today's potential to excessive warm up, but it also may contribute to a late day chance for storms. So will the cold front that's slated to pass through tonight into early Wednesday morning. 

For that, the Storm Prediction Center has most of the region under a level 2 Slight Risk for severe weather, mainly for strong winds and large hail. Forecast models then show tonight's cold front stalling to our south somewhere near I-80. This will be the general area where we can expect further storm development Wednesday afternoon and evening. Highs won't be as warm, though humid conditions will stay put.