Cloud cover Thursday was a little slow to depart for some, leaving temperatures across northern Illinois and southern Wisconsin in the mid-70s through early afternoon. But now that the clouds are beginning to clear temperatures have warmed area-wide into the low to mid 80s. Dew points nearing 70 degrees, however, have pushed the heat index into the low 90s.
Dry conditions will last through most of Thursday evening as severe storms continue across the Upper Midwest. These storms are forming ahead of a cold front that'll slide through the Stateline Friday morning.
The greatest risk for severe weather remains focused across the Midwest through Thursday evening. As both the cold front and line of storms move east it is likely we'll see a weakening trend, especially as the storms near the Mississippi River. However, the leading edge of the storms may still be capable of gusty winds after Midnight, which is why there is a 'marginal' risk for isolated severe storms west of I-39.
Rain and thunder chances will increase after 1am, moving across the region through 6am Friday. As the eastward progression of the front slows Friday a few showers and isolated thunderstorms may be possible, especially southeast of Rockford.
Skies will then clear through Friday night as high pressure moves in for the weekend. Humidity will also lower significantly making it feel much more comfortable through the Labor Day holiday.
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