After a springlike start to the week in Pittsburgh, a bit of wintry precipitation comes with a rapid freeze Thursday.
Although the Wednesday storm started bringing rain early, colder air swept into the area during afternoon which allowed rain to change over to snow by the evening.
This dangerous plunge to subfreezing air will quickly freeze up any wet or slushy roadways and sidewalks Wednesday evening which can cause treacherous travel.
"Car doors and locks may freeze up as the frigid weather moves in," said Senior Meteorologist Dave Dombek.
Drier weather will return for Thursday with temperatures only climbing into the low 20s.
AccuWeather RealFeel® temperatures around daybreak Thursday will be dangerously cold with readings near 20 below zero F.
"The next few days will be like a winter sandwich," said AccuWeather.com Chief Meteorologist Elliot Abrams.
A frigid Thursday will be saddled between some springlike weather. Highs will be back to the lower 50s by Friday.
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Locally heavy lake-effect snow will hinder travel downwind of the Great Lakes to end the week.
A tropical depression in the Bay of Bengal will strengthen as it tracks westward toward India this week.
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The coldest air so far this season will continue to sweep across the central and eastern United States into the weekend.
The first substantial snow and ice storm of the season will hit travel hard along the Interstate 5 corridor, as well as the interior northwestern U.S. by Thursday.
A surge of milder air will bring the warmest air since mid-November to the United Kingdom this week.