Intense bands of lake effect snow will persist most of the night for parts of Sanilac and St. Clair counties.
If you're not under one of these bands, you won't see much snow Thursday night. However, if you are under any of these bands for as little as three hours, you could easily see 4 to 6 inches of snow. For this reason, a Lake Effect Snow Warning has been issued by the National Weather Service for St. Clair and Sanilac Counties until 1 a.m. Friday. At that point, a slight wind shift should push the bands offshore (although you folks in Ontario on the south shore of Lake Huron will see some of these snow bands).
Outside of the snow, all of southeast Michigan is under a Wind Chill Advisory until noon Friday. Clouds will eventually break up tonight, which will allow actual temperatures to fall below zero in many areas. This combined with some wind (it doesn't take much in these temperatures) will generate wind chill temperatures of -15 to -25 -- this is what exposed skin will feel in these conditions.
Some school districts have already closed for Friday, and others will undoubtedly follow. Keep an eye here on ClickOnDetroit.com for Metro Detroit's fastest updating school closing list.
Weather-wise, things will quiet down on Friday into Saturday afternoon. Some light snow will develop late Saturday afternoon or Saturday evening as our strongest cold front of the season approaches.
Now, this is where the forecast gets very tricky: an area of low pressure develops on the tail end of the Saturday night cold front, and then moves northeast. Some computer models keep it far enough south and east of us that we just get a glancing blow with some light snow.
However, one of the normally reliable long range models (the ECMWF) brings it farther north, which gives us another significant accumulating snow. Stay tuned on this one, I should have a much better handle on things tomorrow.
Temperatures on Sunday initially in the low to mid 20s, and then falling during the afternoon as the Arctic air streams in.
Then we really hit the deep freeze Monday through Wednesday, with highs only in the single numbers, and overnight lows well below zero in many areas, especially away from the Detroit Urban Heat Island.
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You’ll find the latest radar images, wind chilly neighborhood temps, and an early look into your weekend forecast on the new ClickOnDetroit app (it’s free!) in your app store.