Forecast: Rain to end, cold pattern persists
Snow-to-mix risk late Saturday into Sunday
FORECAST IN DETAIL
Our super active pattern will not relent. Flood-watch worthy rains soak us this morning before the Arctic air floods the region with wind and cold air. Then, just as the Arctic air begins to retreat, another storm approaches bringing the threat of snow for the second straight weekend.
Today (Wednesday): Steady rains end early but scattered showers and even an isolated thunderstorm are possible (60% chance) for the rest of the day. Despite the chance of showers, as the day wears on, we should start to see breaks in the clouds with some intervals of sunshine. The heart of the cold air won't arrive until late tonight and tomorrow, so afternoon highs will be kind of mild, reaching the low-to-mid 50s. Confidence: Medium-High
Tonight: Cold air spills into the region from the northwest under mostly clear skies, dropping temperatures most of the way through the 30s. When we factor in winds from the northwest at 15-20 mph, it will feel like the 20s. Confidence: Medium
Keep reading for the forecast through the weekend...
Tomorrow (Thursday): With cold air continuing to pour into the area, temperatures aren't going to rise a lot tomorrow -- even with considerable sunshine. Gusty winds from northwest (at 15-25 mph) will keep coming, with highs only in the upper 30s to around 40. Confidence: Medium-High
Tomorrow Night: Winds will only diminish modestly, but temperatures will tumble under mostly clear skies. Everyone will drop into the 20s, with mid-to-upper 20s downtown dipping to near 20 in the coldest north and west suburbs. Confidence: Medium-High
Mostly sunny and not as windy Friday, but still cold. Highs will range from 35 to 40. Mostly clear overnight with lows near 20 in the colder suburbs to the upper 20s (downtown). Confidence: Medium-High
Current indications are that Saturday will begin on the sunny side, with increasing clouds toward evening. High will likely be in the upper 30s and low 40s. Overnight, clouds lower and thicken with a 50% chance of snow after midnight as low pressure approaches from the south. Lows will be around 30.
Snow is possible Sunday morning, though it may mix with or change to sleet and rain as milder air sneaks into the area. By Sunday afternoon, precipitation should taper with highs 35-40. Confidence: Low
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| December 9, 2009; 8:00 AM ET
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