With prevailing winds from first the north to northeast (Monday-Tuesday), then from the southeast (Wednesday -Thursday); Chicagoans will experience an almost unnoticeable day-to-day modification of our air mass over the next four days. By Thursday, the high will be nearly 10 degrees warmer than Monday’s, and the dew point (a measure of moisture in the air) will be about 15 degrees higher. Strong southerly winds are expected to take over Friday, pulling much warmer and more humid air into Illinois. Along with the higher humidity will come a greater chance of showers and thunderstorms. It now appears likely that Saturday will be the hottest day of the week—and perhaps so far this year—with readings well into the 90s.
Meanwhile, the season’s first tropical storm, Alberto, is expected to make landfall on the northwest Florida coast Tuesday—dumping 4-8 inches of rain over much of a state experiencing a moderate to severe drought.
--Paul Dailey, WGN Weather Center Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
