MADISON, Wis. - Fog, drizzle and light rain is expected Friday, followed by some light snow early in the weekend and the season's coldest weather by next week.
A series of storm systems have been affecting the West Coast in a typical El Nino weather pattern. While the main storm has been tracking to the south of Wisconsin and very cold arctic air has stayed to the north in Canada, the first signs of change in the weather pattern might be heading to the area.
Some of the moisture from the West Coast storms is making it into the Midwest. Precipitation chances will continue across much of southern Wisconsin Friday. Drizzle and light rain showers are expected during the day as temperatures climb into the upper 30s.
The main part of the storm system is forecast to move through Wisconsin early on Saturday. Light rain showers will change to light snow showers or flurries Friday night with little to no snowfall accumulation.
As the storm moves east Saturday afternoon, windy and colder air will sweep across the area, causing temperatures to fall through the 20s on Saturday afternoon.
Another storm system will pass just to the southeast of Wisconsin late Saturday. Current model forecasts bring some light accumulating snowfall to far southeast Wisconsin. Any change in the track of this storm will impact snowfall forecasts. If the storm tracks further north and west, southern Wisconsin will see more snow. If the final track of the storm is further to the east, less snow will accumulate in southern Wisconsin.
The coldest air of the winter will arrive early next week.
High temperatures will be in the lower to middle teens from Sunday through Wednesday, with overnight low temperatures within a few degrees of zero, or possibly even a little below zero.
When the brisk winds are factored in, wind chills could approach 20 below zero during the early morning hours. Temperatures and wind chills are expected to improve later next week, and the eight-to 14-day forecast from the National Weather Service Climate Prediction Center calls for near-normal temperatures and precipitation.
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