A series of frequent cold fronts should continue for the next week and beyond. The first of these arrived last Thursday, and Fridays high of 66° was the first sub 70° day since last May 28. The next front sweeps through later Sunday along with a good chance of afternoon thunderstorms. Cooler air with this front has origins in the Plains, with the resultant push of high pressure bringing afternoon temperatures close to the normal of 70°.
Later in the week, the very respectable jet stream begins to buckle, with the upper flow eventually dropping down from northern Canada. As a result, colder air behind Wednesday’s frontal passage will be bracing, with Thursday’s high temperature struggling to reach 60°, and a chance of snow as close as Lake Superior. As a bonus, each front brings a good chance of rain and continued progress to ease the ongoing drought that has gripped northern Illinois since last spring.
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
