Winter Storm in the Central Appalachians through the Northeast; Heavy Snow in the Great Basin and Rockies

A winter storm will impact the central Appalachians to the Northeast through the night. Accumulating snow is expected for interior New England and the northern Mid-Atlantic. Scattered showers and occasional thunderstorms will persist across Florida and the Southeast coast. Locally heavy mountain snow is expected in the Great Basin and Rockies over the next couple of days. Read More >

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

28°F

-2°C

Humidity 86%
Wind Speed W 5 mph
Barometer 29.96 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 3 Dec 3:35 am EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 21. West wind around 5 mph.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 34. Southwest wind 3 to 6 mph.

    High: 34 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of snow showers after 1am.  Mostly cloudy, with a low around 24. West wind 6 to 8 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Thursday

    Thursday: A chance of snow showers before 1pm.  Partly sunny, with a high near 31. West wind 8 to 13 mph, with gusts as high as 32 mph.  Chance of precipitation is 30%.

    High: 31 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 8. Northwest wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 24 mph.

    Low: 8 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 21. West wind around 5 mph.
Wednesday
Partly sunny, with a high near 34. Southwest wind 3 to 6 mph.
Wednesday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 24. West wind 6 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Thursday
A chance of snow showers before 1pm. Partly sunny, with a high near 31. West wind 8 to 13 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 8. Northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 24 mph.
Friday
Mostly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
Mostly cloudy, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 22.
Sunday
Mostly cloudy, with a high near 32.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 30%.
Monday
A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 14.
Tuesday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
1:05 am EST Dec 3, 2025
3am EST Dec 3, 2025-6pm EST Dec 9, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database