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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

16°F

-9°C

Humidity 86%
Wind Speed SW 8 mph
Barometer 29.79 in
Dewpoint 12°F (-11°C)
Visibility 4.00 mi
Wind Chill5°F (-15°C)
Last update 19 Jan 6:35 am EST
Extended Forecast for

3 Miles S Kersey PA

Cold Weather Advisory January 19, 09:00pm until January 20, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • M.L.King Day

    M.L.King Day: A chance of snow showers, mainly before 3pm. Mostly cloudy, with a high near 22. Wind chill values as low as -5. Breezy, with a southwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 40%.

    High: 22 °F

    Chance Snow
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 1. Wind chill values as low as -15. Breezy, with a west wind 15 to 21 mph, with gusts as high as 34 mph.

    Low: 1 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 11. Wind chill values as low as -20. West wind 13 to 15 mph, with gusts as high as 28 mph.

    High: 11 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 5. Wind chill values as low as -5. Southwest wind 6 to 9 mph.

    Low: 5 °F

    Mostly Clear

  • Wednesday

    Wednesday: Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 31. South wind 7 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Slight Chance
    Snow Showers
    then Snow
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 24 °F

    Snow Showers
    Likely

  • Thursday

    Thursday: A chance of snow showers before 1pm. Partly sunny, with a high near 28. Chance of precipitation is 40%.

    High: 28 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 8.

    Low: 8 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 17.

    High: 17 °F

    Mostly Cloudy

Detailed Forecast

M.L.King Day
A chance of snow showers, mainly before 3pm. Mostly cloudy, with a high near 22. Wind chill values as low as -5. Breezy, with a southwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, with a low around 1. Wind chill values as low as -15. Breezy, with a west wind 15 to 21 mph, with gusts as high as 34 mph.
Tuesday
Partly sunny, with a high near 11. Wind chill values as low as -20. West wind 13 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 5. Wind chill values as low as -5. Southwest wind 6 to 9 mph.
Wednesday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 31. South wind 7 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday
A chance of snow showers before 1pm. Partly sunny, with a high near 28. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 8.
Friday
Mostly cloudy, with a high near 17.
Friday Night
Mostly cloudy, with a low around -2.
Saturday
Partly sunny and cold, with a high near 8.
Saturday Night
Mostly cloudy, with a low around -3.
Sunday
A chance of snow. Partly sunny, with a high near 12. Chance of precipitation is 30%.
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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:
4:46 am EST Jan 19, 2026
Forecast Valid:
6am EST Jan 19, 2026-6pm EST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation