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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

25°F

-4°C

Humidity 59%
Wind Speed S 7 mph
Barometer 29.93 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 9 Dec 12:55 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Winter Weather Advisory December 10, 01:00am until December 10, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: A chance of snow, mainly after 3pm. Mostly cloudy, with a high near 28. South wind around 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 28 °F

    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly after 4am. Cloudy, with a low around 25. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 25 °F

    Cloudy then
    Snow Likely

  • Wednesday

    Wednesday: Snow. High near 36. Southwest wind around 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    High: 36 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow showers likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 21. West wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Snow Showers
    Likely

  • Thursday

    Thursday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 26. West wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Snow Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.

    Low: 20 °F

    Chance Snow
    Showers

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 30%.

    High: 28 °F

    Chance Snow

  • Friday Night

    Friday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.

    Low: 18 °F

    Snow Likely

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 50%.

    High: 29 °F

    Chance Snow

Detailed Forecast

This Afternoon
A chance of snow, mainly after 3pm. Mostly cloudy, with a high near 28. South wind around 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tonight
Snow likely, mainly after 4am. Cloudy, with a low around 25. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
Snow. High near 36. Southwest wind around 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow showers likely, mainly between 7pm and 1am. Mostly cloudy, with a low around 21. West wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 26. West wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.
Friday
A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 30%.
Friday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.
Saturday
A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 50%.
Saturday Night
Snow likely. Cloudy, with a low around 18. Chance of precipitation is 70%.
Sunday
A chance of snow. Mostly cloudy, with a high near 23. Chance of precipitation is 50%.
Sunday Night
Mostly cloudy, with a low around 10.
Monday
Mostly cloudy, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
1:05 pm EST Dec 9, 2025
Forecast Valid:
1pm EST Dec 9, 2025-6pm EST Dec 15, 2025
 
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