ROCKFORD (WREX) – Thunderstorms are coming back into the picture Tuesday, and could bring strong to severe activity to the region. In addition to the potential severe weather, heavy rainfall may also be a threat in spots.
A complex of thunderstorms will brew up in Iowa late tonight, and move through the Stateline generally after 10 am. By then, a line of strong to severe storms will be on the leading edge of this complex. Rain showers and a few weaker storms will follow. All showers and storms should be out of the area by the early afternoon.
The main severe risk for tomorrow is damaging wind gusts (over 60 mph). Hail and heavy rainfall (1″+ rain totals) are possible, but not likely. Isolated tornadoes are not expected. Be sure to secure any loose items (patio furniture, etc) tonight just in case. The main risk area looks to be south of Dixon, but a low risk extends through all of northern Illinois.
Once the complex clears our area, there is a lingering slight chance for scattered showers and storms in the afternoon to evening, but that chance remains pretty low for now. Look for temperatures in the middle 80’s again.
A cold front moves through by Wednesday morning, resulting in a change of pace from the warmer and more humid weather. We’ll still see the low 80’s Wednesday afternoon, but then the 70’s for highs kick in Thursday through possibly Saturday. The humidity will drop, resulting in comfortable air through the start of the weekend.
Warmer and more humid weather will eventually move back in, possibly as early as Sunday. We should stay near average for much of next week. The warmer weather may be short-lived, as the long range outlook from the Climate Prediction Center shows below average temperatures for much of early September.