So we're got this going for us....which is nice.

Monday
H: 14
L: 8

Highs down as much as 40 degrees from Sunday. Temperatures between 10 and 15 degrees remain steady or slowly fall through the day despite a partly sunny sky. Strong west winds 15-25 m.p.h. gusting in excess of 30 m.p.h. send windchills as low as 10-15 degrees below zero. Partly cloudy and very cold overnight with lows from zero at the coldest inland locations to 5-10 degrees downtown.

Forecast
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As of 9:32 PM CST on December 14, 2008

Rest of Tonight...Periods of rain...freezing rain and sleet late in the evening...then a chance of light snow after midnight. Snow and sleet accumulation up to 1 inch. New ice accumulation of less than one quarter of an inch. Blustery. Turning sharply colder. Lows 10 to 14...except 14 to 18 downtown. West winds 15 to 25 mph with gusts up to 30 mph at times. Chance of precipitation 100 percent.

Monday...Partly cloudy. Blustery...cold. Highs 14 to 18. Wind chills as low as zero to 10 below zero. West winds 15 to 25 mph. Gusts up to 30 mph in the morning.

Monday Night...Mostly clear in the evening then becoming partly cloudy. Lows 7 to 11 above. Wind chills as low as zero to 10 below zero. Northwest winds 10 to 15 mph until early morning becoming light and variable during the predawn hours.
http://weather.wgntv.com/US/IL/Chicago.html?main=1