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

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

28°F

-2°C

Humidity 80%
Wind Speed SW 10 G 22 mph
Barometer 29.57 in
Dewpoint 23°F (-5°C)
Visibility 0.75 mi
Wind Chill19°F (-7°C)
Last update 31 Dec 7:35 pm EST
Extended Forecast for

3 Miles S Kersey PA

Winter Weather Advisory until January 1, 04:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 1, 04:00pm

    NOW until 4:00pm Thu

    Winter Weather Advisory

  • Tonight

    Low: 11 °F

    Heavy Snow

  • New Year's Day

    New Year's Day: Mostly cloudy, with a high near 17. Wind chill values as low as -5. West wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 17 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 12. Wind chill values as low as zero. West wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 12 °F

    Chance Snow
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 23. Wind chill values as low as zero. West wind 11 to 13 mph, with gusts as high as 23 mph.

    High: 23 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 14. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 14 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 26.

    High: 26 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow showers, mainly before 2am. The snow could be heavy at times. Low around 11. Wind chill values as low as zero. Northwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.
New Year's Day
Mostly cloudy, with a high near 17. Wind chill values as low as -5. West wind 10 to 14 mph, with gusts as high as 25 mph.
Thursday Night
A chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 12. Wind chill values as low as zero. West wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 23. Wind chill values as low as zero. West wind 11 to 13 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 14. West wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 15.
Sunday
Mostly cloudy, with a high near 26.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Kersey PA
 41.29°N 78.63°W (Elev. 1896 ft)
Last Update:
7:05 pm EST Dec 31, 2025
Forecast Valid:
7pm EST Dec 31, 2025-6pm EST Jan 7, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation