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

36°F

2°C

Humidity 81%
Wind Speed NW 12 G 17 mph
Barometer 30.14 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 24 Dec 4:35 am EST
Extended Forecast for

3 Miles S Kersey PA

Winter Storm Watch December 26, 07:00am until December 27, 07:00am
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Partly sunny, with a high near 37. Northwest wind 5 to 14 mph, with gusts as high as 26 mph.

    High: 37 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of snow between 2am and 3am, then a slight chance of rain after 3am. Mostly cloudy, with a low around 29. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 20%.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Christmas Day

    Christmas Day: Partly sunny, with a high near 40. South wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 40 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 20. North wind 5 to 7 mph becoming east after midnight.

    Low: 20 °F

    Mostly Cloudy

  • Friday

    Friday: Snow and freezing rain before 4pm, then freezing rain, possibly mixed with sleet. High near 27. Southeast wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow and sleet accumulation of less than one inch possible.

    High: 27 °F

    Chance Wintry
    Mix then
    Wintry Mix

  • Friday Night

    Friday Night: Freezing rain, possibly mixed with sleet, becoming all freezing rain after 10pm. Low around 23. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.

    Low: 23 °F

    Wintry Mix
    then Freezing
    Rain

  • Saturday

    Saturday: Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of rain after 1am. Cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain. High near 42. Chance of precipitation is 80%.

    High: 42 °F

    Rain

Detailed Forecast

Today
Partly sunny, with a high near 37. Northwest wind 5 to 14 mph, with gusts as high as 26 mph.
Tonight
A slight chance of snow between 2am and 3am, then a slight chance of rain after 3am. Mostly cloudy, with a low around 29. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 20%.
Christmas Day
Partly sunny, with a high near 40. South wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 20. North wind 5 to 7 mph becoming east after midnight.
Friday
Snow and freezing rain before 4pm, then freezing rain, possibly mixed with sleet. High near 27. Southeast wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow and sleet accumulation of less than one inch possible.
Friday Night
Freezing rain, possibly mixed with sleet, becoming all freezing rain after 10pm. Low around 23. Chance of precipitation is 90%. New sleet accumulation of less than a half inch possible.
Saturday
Mostly cloudy, with a high near 37.
Saturday Night
A chance of rain after 1am. Cloudy, with a low around 30. Chance of precipitation is 30%.
Sunday
Rain. High near 42. Chance of precipitation is 80%.
Sunday Night
Rain and snow, becoming all snow after 1am. Low around 20. Breezy. Chance of precipitation is 80%.
Monday
Snow showers likely. Mostly cloudy, with a high near 25. Breezy. Chance of precipitation is 70%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 13. Breezy. Chance of precipitation is 50%.
Tuesday
A chance of snow showers. Mostly cloudy, with a high near 21. Chance of precipitation is 30%.
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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:
4:46 am EST Dec 24, 2025
Forecast Valid:
4am EST Dec 24, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation