Heavy Rain in the Southern U.S.; Winter Storm to Impact the Northern Mid-Atlantic and Interior Northeast

A storm system stretching from the Tennessee Valley to the Gulf Coast will bring a variety of hazards to the Eastern U.S. through Tuesday. On the south side of the system, heavy rain and thunderstorms will persist across the Southern U.S. Further north, a wintry precipitation mix is expected from the Central Appalachians to the interior Northeast through Tuesday. Read More >

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

32°F

0°C

Humidity 64%
Wind Speed SE 7 mph
Barometer 29.93 in
Dewpoint 21°F (-6°C)
Visibility 7.00 mi
Wind Chill25°F (-4°C)
Last update 2 Dec 3:15 am EST
Extended Forecast for

3 Miles S Kersey PA

Winter Weather Advisory until December 2, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 2, 01:00pm

    NOW until 1:00pm Tue

    Winter Weather Advisory

  • Overnight

    Low: 21 °F

    Heavy Snow

  • Tuesday

    Tuesday: Snow, mainly before 10am. The snow could be heavy at times.  High near 33. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.  Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 33 °F

    Heavy Snow
    then Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. West wind 6 to 8 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 30. Southwest wind 6 to 10 mph.

    High: 30 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Scattered snow showers after 1am.  Mostly cloudy, with a low around 22. Southwest wind 9 to 13 mph, with gusts as high as 23 mph.  Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 22 °F

    Mostly Cloudy
    then
    Scattered
    Snow Showers

  • Thursday

    Thursday: Scattered snow showers before 1pm.  Partly sunny, with a high near 28. Chance of precipitation is 40%.

    High: 28 °F

    Scattered
    Snow Showers

  • Thursday Night

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

    Low: 7 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 21. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Snow, mainly before 10am. The snow could be heavy at times. High near 33. Light and variable wind becoming northwest 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Mostly cloudy, with a low around 20. West wind 6 to 8 mph.
Wednesday
Mostly cloudy, with a high near 30. Southwest wind 6 to 10 mph.
Wednesday Night
Scattered snow showers after 1am. Mostly cloudy, with a low around 22. Southwest wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Thursday
Scattered snow showers before 1pm. Partly sunny, with a high near 28. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 7.
Friday
Mostly sunny, with a high near 27.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 30%.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 30. Chance of precipitation is 30%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 14. Chance of precipitation is 40%.
Monday
A chance of snow showers. Partly sunny, with a high near 24. Chance of precipitation is 30%.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Kersey PA
 41.29°N 78.63°W (Elev. 1896 ft)
1:57 am EST Dec 2, 2025
3am EST Dec 2, 2025-6pm EST Dec 8, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database