Weather Authority: Winter Storm Warning issued for Bucks, Montgomery, Mercer Counties

The first blast of winter has arrived and brings changes and updates to the Delaware Valley's forecast.

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The National Weather Service has extended the Winter Storm Warning to include Bucks, Montgomery and Mercer Counties from 6a.m. Monday, December 2 until 4 a.m. Tuesday, December 3. Snow could total 3 to 6 inches, in some locations.

Areas to the north of Philadelphia such as the Poconos can expect a steadier dose of snow that could accumulate upwards of 10 inches.

A Winter Weather Advisory is in effect for Philadelphia, Delaware County, Chester County, Berks County in Pennsylvania and Burlington, Camden, Gloucester and Ocean Counties in New Jersey from 9 a.m. Monday through 4 a.m. Tuesday. Snow totals, in some locations, could accumulate 2 to 4 inches.

  A Winter Storm Warning remains in effect for Carbon County and Monroe County until 1 a.m. Tuesday.

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FOX 29 Weather Authority seven-day forecast:

Monday: Rain to snow. High: 40 Low: 38

Tuesday: Partly sunny. High: 43 Low: 33

Wednesday: Slight chance of rain. High: 46 Low: 33

Thursday: Partly cloudy. High: 46 Low: 34

Friday: Partly sunny. High: 48 Low: 30