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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

34°F

1°C

Humidity 75%
Wind Speed SW 10 G 16 mph
Barometer 29.65 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 10 Dec 2:35 am EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Winter Weather Advisory December 10, 02:39am until December 12, 04:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 10, 02:39am until December 12, 04:00am

    NOW until 4:00am Fri

    Winter Weather Advisory

  • Overnight

    Low: 25 °F

    Snow Likely

  • Wednesday

    Wednesday: Rain and snow, becoming all snow after 2pm, then gradually ending. The snow could be heavy at times. High near 36. Southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    High: 36 °F

    Heavy Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow likely before 10pm, then a chance of snow showers after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 19. Northwest wind around 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Snow Likely
    then Chance
    Snow Showers

  • Thursday

    Thursday: Snow showers likely, mainly before 1pm. The snow could be heavy at times. Mostly cloudy, with a high near 24. West wind around 16 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 24 °F

    Heavy Snow

  • Thursday Night

    Thursday Night: A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 20. West wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    Low: 20 °F

    Chance Snow
    Showers

  • Friday

    Friday: A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 27. Chance of precipitation is 30%.

    High: 27 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: A chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 50%.

    Low: 17 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: A chance of snow showers. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.

    High: 26 °F

    Chance Snow
    Showers

Detailed Forecast

Overnight
Snow likely, mainly after 5am. Cloudy, with a low around 25. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.
Wednesday
Rain and snow, becoming all snow after 2pm, then gradually ending. The snow could be heavy at times. High near 36. Southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow likely before 10pm, then a chance of snow showers after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 19. Northwest wind around 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly before 1pm. The snow could be heavy at times. Mostly cloudy, with a high near 24. West wind around 16 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 20. West wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Friday
A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 27. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 50%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.
Saturday Night
Snow showers likely. Cloudy, with a low around 14. Chance of precipitation is 60%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 20. Chance of precipitation is 50%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 11. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 22.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
2:21 am EST Dec 10, 2025
Forecast Valid:
2am EST Dec 10, 2025-6pm EST Dec 16, 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