All Hazards NOAA Weather Radio | Live Chicago Weather Updates
A shot of cold air from Canada last night created a very cold start to the day today and the extensive cloud cover helped to prevent any warming. It was the coldest start in 18 days, and with limited warming, today, joined December 10 as the only other day in which the high temperature failed to reach the freezing mark. To further put into perspective how unusual this event was today, prior to today, we had 20 days of above normal high temperatures this month, 17 of which were at least 40 degrees.
The pocket of unseasonably cool air will not be long-lived. Riding on westerly winds, mild Pacific air will replace this sudden chill. Tonight, a warm front will lift across the area as the leading edge of this mild Pacific airmass. Precipitation will develop ahead of this warm front in the form of light snow that will quickly change over to freezing rain. While this will by no means be a major ice or snow event, it could be enough to cause potentially hazardous driving conditions overnight into Thursday morning.
Clouds will be on the increase Thursday afternoon and evening ahead of disturbance that will bring rain (city & south) or a rain/snow mix (north) to the region Thursday night through Friday afternoon.
New Year’s Eve Forecast
On New Year’s Eve (Saturday), winds will shift out of the south and increase in intensity with gust as high as 40 mph. This will help to advect an airmass that will bring widespread 50s to the region. The predicted airmass could bring us our warmest readings since December 15 where the high temperature was 57 degrees at O’Hare.
Thursday: Mostly cloudy with a chance for rain late. Highs in the mid 40s. Winds southwest 10-20 mph with gust as high as 30 mph.
Friday: Partly sunny with a chance for rain. Highs in the mid 40s. Winds west-southwest 10-20 mph becoming northwest 10-20 mph.
Saturday/New Year’s Eve: Partly cloudy and windy. Clouds increase in the afternoon/evening. Rain develops late. Highs in the upper 40s to lower 50s. Winds southwest 15-25 mph with gust as high as 40 mph.
Sunday/New Year’s Day: Mostly cloudy and windy. Temperatures falling during the day. Rain mixes or changes over to light snow during the morning hours. Highs in the lower 40s. Winds west-northwest 15-25 mph with gust to 50 mph.
Monday: Partly cloudy, sharply colder, and windy. Highs in the low to mid 20s. Winds north-northwest 15-25 mph.
Tuesday: Partly cloudy and unseasonably cold. Highs in the upper 20s. Winds north-northwest 10-20 mph.
Wednesday: Mostly sunny and cool. Highs in the mid 30s. Winds west-southwest 5-15 mph.
8-15 day outlook (Long-range Forecast
Thursday Jan 5: Highs in the 40s/50s.
Friday Jan 6: Highs in the 50s.
Saturday Jan 7: Highs in the 40s.
Sunday Jan 8: Highs in the 30s/40s.
Monday Jan 9: Highs in the 30s/40s.
Tuesday Jan 10: Highs in the 30s/40s.
Wednesday Jan 11: Highs in the 40s.
Thursday Jan 12: Highs in the 40s.
Friday Jan 13: Highs in the 30s.
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