HIGH: 20
LOW: 4
Arctic air is back: Tuesday highs 15 to 20 degrees lower than 24 hours earlier!
* Flurries possible early, then blustery and colder.
* Temperatures fall through the teens over snow-covered areas northwest of the city.
* Northwest winds 10 to 20 mph produce wind chills that could hit single digits in the afternoon.
* Clear at night. Lows of zero inland to 10 degrees by the lake. Overnight wind chills zero to minus 10.
DEC. 15 TEMPERATURES
Normal high/low: 34(degrees)/20(degrees)
Record high: 64(degrees) (1971)
Record low: -12(degrees) (1901)
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Weather Report is prepared by the WGN-TV Weather Center, where Tom Skilling is chief meteorologist. His forecasts can be seen Monday through Friday on WGN News at 11 a.m., 5 p.m. and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
Weather updates: Search for forecasts by ZIP code and radar images at chicagotribune.com/weather or wgntv.com
