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

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

19°F

-7°C

Humidity 45%
Wind Speed W 20 G 30 mph
Barometer 30.14 in
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 23 Jan 12:35 pm EST
Extended Forecast for

3 Miles S Kersey PA

Cold Weather Advisory January 23, 01:00pm until January 24, 10:00am
Winter Storm Warning January 24, 10:00pm until January 26, 01:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning

  • This Afternoon

    This Afternoon: Mostly cloudy, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 16 to 18 mph, with gusts as high as 32 mph.

    High: 15 °F⇓

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around -5. Wind chill values as low as -20. Northwest wind 7 to 14 mph, with gusts as high as 25 mph.

    Low: -5 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 9. Wind chill values as low as -15. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 9 °F

    Cold

  • Saturday Night

    Saturday Night: Snow, mainly after 1am. Low around 7. Wind chill values as low as -10. Light east wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 7 °F

    Slight Chance
    Snow then
    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 15. East wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 15 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. Low around 12. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 12 °F

    Snow

  • Monday

    Monday: Snow likely, mainly before 1pm. Mostly cloudy, with a high near 15. Chance of precipitation is 60%.

    High: 15 °F

    Snow Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 11.

    High: 11 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly cloudy, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 16 to 18 mph, with gusts as high as 32 mph.
Tonight
Partly cloudy, with a low around -5. Wind chill values as low as -20. Northwest wind 7 to 14 mph, with gusts as high as 25 mph.
Saturday
Partly sunny and cold, with a high near 9. Wind chill values as low as -15. Northwest wind around 6 mph becoming calm in the afternoon.
Saturday Night
Snow, mainly after 1am. Low around 7. Wind chill values as low as -10. Light east wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday
Snow. The snow could be heavy at times. High near 15. East wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Sunday Night
Snow. Low around 12. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Monday
Snow likely, mainly before 1pm. Mostly cloudy, with a high near 15. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around -2.
Tuesday
Mostly cloudy, with a high near 11.
Tuesday Night
Mostly cloudy, with a low around 2.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 13. Chance of precipitation is 30%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 0. Chance of precipitation is 30%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 13. 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:
11:54 am EST Jan 23, 2026
Forecast Valid:
12pm EST Jan 23, 2026-6pm EST Jan 29, 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