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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Fair

10°F

-12°C

Humidity 52%
Wind Speed SW 6 mph
Barometer 30.33 in
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 20 Jan 11:55 pm EST
Extended Forecast for

3 Miles S Kersey PA

Winter Weather Advisory January 21, 12:00pm until January 22, 10:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 5. Wind chill values as low as -5. South wind around 7 mph.

    Low: 5 °F

    Mostly Clear

  • Wednesday

    Wednesday: Snow, mainly after 11am. High near 32. Wind chill values as low as -5. South wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 32 °F

    Chance Snow
    then Snow

  • Wednesday Night

    Wednesday Night: Snow, mainly before 1am. Low around 25. Southwest wind 13 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Snow

  • Thursday

    Thursday: A slight chance of snow before 1pm. Partly sunny, with a high near 30. West wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 30 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10. West wind around 11 mph, with gusts as high as 23 mph.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 14.

    High: 14 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -3.

    Low: -3 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 8.

    High: 8 °F

    Cold

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 2. Chance of precipitation is 50%.

    Low: 2 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 5. Wind chill values as low as -5. South wind around 7 mph.
Wednesday
Snow, mainly after 11am. High near 32. Wind chill values as low as -5. South wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow, mainly before 1am. Low around 25. Southwest wind 13 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday
A slight chance of snow before 1pm. Partly sunny, with a high near 30. West wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 10. West wind around 11 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 14.
Friday Night
Mostly cloudy, with a low around -3.
Saturday
Partly sunny and cold, with a high near 8.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 2. Chance of precipitation is 50%.
Sunday
Snow likely, mainly before 1pm. Mostly cloudy, with a high near 14. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 3. Chance of precipitation is 40%.
Monday
A chance of snow. Mostly cloudy, with a high near 16. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 4.
Tuesday
Partly sunny, with a high near 17.
Basemap Options
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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:
11:26 pm EST Jan 20, 2026
Forecast Valid:
12am EST Jan 21, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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