There haven’t been many days this summer quite like Monday. A reading cooler than Chicago’s 73° official high has occured this season on only four other days since June 1. It was the city’s lowest daytime maximum in nearly two months since June 18, and equalled the area’s normal high on Sept. 17-19. While only five days this summer have failed to break above 73°, last summer’s chill had produced 21 such days by this point in the season.
The cold Canadian air mass also produced lows of 35° in northern Minnesota’s Embarrass and in Osceola in northwest Wisconsin. Frost advisories were in effect overnight in sections of interior Upper Michigan.
Tropical Storm Jose formed west of Mexico’s Yucatan Peninsula over the Bay of Campeche Monday. Its peak winds reached 50 m.p.h., but, the system’s steady westward movement limited its time over the the warm tropical ocean waters curtailing further development.
--Tom Skilling
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
