Autumn’s chilliest air, which only days ago roamed Canada’s partially snow-covered tundra 1,700 miles to the north, delivers a second and third day of November-level 50s here Thursday and Friday. The chill, interacting with Lake Michigan’s comparatively warm waters, activated lake-effect rain showers in western Michigan and northeast Wisconsin Wednesday—rains which have shifted overnight into Indiana. Projected winds suggest those rain showers may end up swiping sections of extreme northeast Illinois Thursday—in particular eastern Lake and Cook Counties. But it’s northwest Indiana which is the target of the heaviest, most prolonged lake rains. Several computer forecast models, which aid forecasters in predicting small scale weather features, indicate some 0.50"+ rain totals are possible in Porter and LaPorte Counties before the lake-effect set-up breaks down Friday morning.
--By Tom Skilling, WGN-TV Chief Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
