Skies were quick to clear this morning which allowed temperatures to briefly drop into the upper 20s in Rockford, while the low 30s were found everywhere else. The sun-filled skies were then quick to warm afternoon temperatures back into the low 50s.
The clear skies will last through sunset with cloud cover increasing late tonight. These clouds are ahead of an incoming low-pressure system, currently located over the Upper Midwest, which will move towards the Stateline by early Wednesday. Scattered rain showers have been developing around the low and are expected to move into the region towards Midnight, lasting into early Wednesday morning. Similar to Monday night the rainfall totals won't be much with most locations picking up less than a tenth of an inch. Temperatures Tuesday night will be a little milder as winds turn back to the south through morning.
There may also be just enough instability ahead of the low late tonight that a rogue lightning strike or two occurs, leading to a few rumbles of thunder. The chance for this occurring remains fairly low, less than 20%, but it is possible.
Brief clearing during the mid-day hours will help bring afternoon temperatures close to 50 degrees once again. However, if that clearing doesn't occur then highs will be confined in the 40s. As a cold front moves in behind the departing low Wednesday afternoon winds will turn to the northwest ushering in a cooler air mass Wednesday night and Thursday. A few spotty showers may follow the passage of the front through Wednesday evening.
A brisk northwest wind will remain in place Thursday which will help keep the cloud cover around during the first half of the day. A few widely scattered and spotty showers will occur during the afternoon, possibly mixed in with a few flurries. Highs on Thursday will remain in the low 40s with numbers quickly jumping back into the 50s Friday afternoon.
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