National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

8°F

-13°C

Humidity 54%
Wind Speed Calm
Barometer 30.49 in
Dewpoint -5°F (-21°C)
Visibility 10.00 mi
Last update 21 Jan 6:55 am EST
Extended Forecast for

4 Miles NNW Pomeroy PA

  • Today

    Today: Increasing clouds, with a high near 33. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

    High: 33 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 29. South wind 10 to 15 mph.

    Low: 29 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Mostly sunny, with a high near 43. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 43 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. West wind 5 to 10 mph.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33. West wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 7.

    Low: 7 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 15.

    High: 15 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 70%.

    Low: 10 °F

    Chance Snow
    then Snow
    Likely

  • Sunday

    Sunday: Snow. High near 16. Chance of precipitation is 80%.

    High: 16 °F

    Snow

Detailed Forecast

Today
Increasing clouds, with a high near 33. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 29. South wind 10 to 15 mph.
Thursday
Mostly sunny, with a high near 43. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday Night
Partly cloudy, with a low around 22. West wind 5 to 10 mph.
Friday
Partly sunny, with a high near 33. West wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Mostly cloudy, with a high near 15.
Saturday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 70%.
Sunday
Snow. High near 16. Chance of precipitation is 80%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 50%.
Monday
A chance of snow. Mostly sunny, with a high near 22. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 5.
Tuesday
Sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Pomeroy PA
 40.02°N 75.96°W (Elev. 495 ft)
Last Update:
4:11 am EST Jan 21, 2026
Forecast Valid:
7am EST Jan 21, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation