As hot and humid conditions persist into a second day, the National Weather Service continues the Excessive Heat Warning and the Illinois EPA continues the Air Pollution Action Day for Chicago. The approach of a cold front should increase the chance of thunderstorms—a few could be severe—later this afternoon and more likely tonight. These storms will bring needed rain and also cool things off a bit.
Northeast winds Tuesday will drop highs down into the “normal” mid 80s; but where it rained, sunshine will enhance evaporation, and the added moisture into the air will make it feel humid. A quick warm-up Wednesday will be cut off by the approach of a second cold front with more significant rains possible later that day and night into Thursday. Cooler, less humid conditions are in store Thursday-Friday.
More 100°-plus record highs were reported Sunday across the central Plains, including 113° at Valentine, Neb.
--By Paul Dailey, WGN-TV Weather Center Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
