Friday will be another sunny day, and temperatures will surge 16-17 degrees above normal as southerly winds pump warm air across the region. The southerly flow is part of a huge sweep of south winds that extend from the Gulf of Mexico to James Bay in southern Canada — a distance of 2,100 miles.
Warm temperatures persist through Saturday, but the end is in sight. A cold front pushing into the northern Great Plains on Friday continues eastward Saturday and crosses Chicago early Sunday, accompanied by showers and possibly some thunder. The air mass following behind the front is of Pacific origin and, though cooler, takes Sunday’s high temperature into the upper 60s.
Readings jump again to 70 on Monday, but a stronger surge of chilly Canadian air, the coldest yet of the season, arrives Tuesday.
