Sunshine's return to the Stateline skies was a sight for sore eyes Monday, after it had been noticeably absent for the better part of the past two weeks. Only once this month prior to today had the Rockford area witnessed so much as a partly cloudy sky, with the last mostly sunny day having occurred nearly two weeks ago on September 26! It's little wonder why temperatures have struggled greatly for the past several days!
Monday's sun was enough to bring temperatures to within reach of 70°, and with plentiful sun expected over the next few days, it's fair to assume temperatures will be in similar territory. Wall-to-wall sunshine is in the cards Tuesday, as high pressure will be parked directly overhead. Temperatures Tuesday may be ever so slightly cooler thanks to the lighter wind regime in play, though they're expected to remain very close to normal for this time of year.
Mild air will dominate through the end of the workweek, at which time a powerful cold front will barrel through the region Friday. This front's passage may trigger some rather robust thunderstorms in or around the Stateline Friday afternoon, a development to be monitored closely. The much more significant impact, by all accounts, will be the extreme temperature crash that follows. Current projections take us from a 71° high temperature Friday Afternoon all the way down to 37° early Saturday Morning, with wind chills in the 20s a distinct possibility.
The cold airmass set to grip the Stateline will likely touch off a few sprinkles Sunday afternoon, though not too far to our north, it's entirely possible a few wet snowflakes will fly over parts of Wisconsin and Minnesota.