Accumulating snow expected overnight across Western Pennsylvania

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A storm passing through the Pittsburgh area will cause temperatures to plunge and snow to accumulate overnight, the National Weather Service said.

Rain will turn to snow around midnight in Pittsburgh and even earlier in areas north of the city, NWS meteorologist Brad Rehak said. The snow is expected to end before 7 a.m.

In Pittsburgh, as much as 2 inches of snow is possible, with 3 to 4 inches possible in the Laurel Highlands, NWS meteorologist John Darnley said.

Depending on the intensity, snow could accumulate on roads and bridges, he said. Slick conditions are likely for the Tuesday morning commute, with temperatures below 30 degrees and a stiff wind that will make it feel like 20 degrees outside.

"It's going to be chilly if you're out there waiting for a bus," Mr. Darnley said. "It's going to feel almost like February."

A weak high front to the southeast of Pittsburgh will move off today, allowing a moist weather system from the Gulf of Mexico to take over. It will collide head-on with an Arctic blast from Canada, causing temperatures to tumble and snow to fly, he said.

Last year, the first snowfall exceeding 1 inch did not occur until Dec. 21, according to weather service data.

Jon Schmitz:, 412-263-1868 and on Twitter @pgtraffic. Lexi Belculfine: or 412-263-1878. Twitter: @LexiBelc. First Published November 11, 2013 9:22 AM

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