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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Mostly Cloudy

5°F

-15°C

Humidity 85%
Wind Speed NW 7 mph
Barometer 29.99 in
Dewpoint 1°F (-17°C)
Visibility 4.00 mi
Wind Chill-7°F (-22°C)
Last update 1 Feb 4:15 am EST
Extended Forecast for

3 Miles S Kersey PA

Cold Weather Advisory until February 1, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until February 1, 10:00am

    NOW until 10:00am Sun

    Cold Weather Advisory

  • Overnight

    Low: -1 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 16. Wind chill values as low as -15. Northwest wind 9 to 11 mph, with gusts as high as 24 mph.

    High: 16 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 2. Wind chill values as low as -10. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 2 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 21. Wind chill values as low as -10. West wind around 8 mph.

    High: 21 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 11. Southwest wind around 6 mph.

    Low: 11 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow showers after 1pm. Mostly cloudy, with a high near 25. Chance of precipitation is 20%.

    High: 25 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 3.

    Low: 3 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 21.

    High: 21 °F

    Partly Sunny

Detailed Forecast

Overnight
Mostly cloudy, with a low around -1. Wind chill values as low as -15. Northwest wind around 8 mph.
Sunday
Partly sunny, with a high near 16. Wind chill values as low as -15. Northwest wind 9 to 11 mph, with gusts as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 2. Wind chill values as low as -10. West wind 8 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 21. Wind chill values as low as -10. West wind around 8 mph.
Monday Night
Mostly cloudy, with a low around 11. Southwest wind around 6 mph.
Tuesday
A slight chance of snow showers after 1pm. Mostly cloudy, with a high near 25. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 3.
Wednesday
Partly sunny, with a high near 21.
Wednesday Night
Mostly cloudy, with a low around 1.
Thursday
Partly sunny, with a high near 20.
Thursday Night
Mostly cloudy, with a low around 9.
Friday
Snow showers. High near 26. Chance of precipitation is 80%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 2. Chance of precipitation is 50%.
Saturday
Partly sunny and cold, with a high near 9.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Kersey PA
 41.29°N 78.63°W (Elev. 1896 ft)
Last Update:
2:41 am EST Feb 1, 2026
Forecast Valid:
4am EST Feb 1, 2026-6pm EST Feb 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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