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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 93%
Wind Speed SW 9 G 20 mph
Barometer 29.30 in
Dewpoint 34°F (1°C)
Visibility 1.50 mi
Wind Chill29°F (-2°C)
Last update 10 Dec 1:35 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Winter Weather Advisory December 10, 01:53pm until December 12, 04:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 10, 01:53pm until December 12, 04:00am

    NOW until 4:00am Fri

    Winter Weather Advisory

  • This Afternoon

    High: 33 °F

    Rain/Snow

  • Tonight

    Tonight: Snow likely before midnight, then a slight chance of snow after 5am. Mostly cloudy, with a low around 20. Northwest wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Snow Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: Snow showers likely, mainly between 1pm and 2pm. Mostly cloudy, with a high near 24. West wind 11 to 14 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    High: 24 °F

    Snow Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of snow showers before 1am, then a slight chance of snow after 1am. Mostly cloudy, with a low around 19. West wind 10 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 27. West wind 5 to 8 mph.

    High: 27 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A chance of snow, mainly after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.

    Low: 16 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.

    High: 27 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 60%.

    Low: 12 °F

    Snow Likely

Detailed Forecast

This Afternoon
Snow before 5pm, then a chance of rain and snow. High near 33. Southwest wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 2 to 4 inches possible.
Tonight
Snow likely before midnight, then a slight chance of snow after 5am. Mostly cloudy, with a low around 20. Northwest wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly between 1pm and 2pm. Mostly cloudy, with a high near 24. West wind 11 to 14 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Thursday Night
A chance of snow showers before 1am, then a slight chance of snow after 1am. Mostly cloudy, with a low around 19. West wind 10 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Friday
Mostly cloudy, with a high near 27. West wind 5 to 8 mph.
Friday Night
A chance of snow, mainly after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.
Saturday
A chance of snow. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.
Saturday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 60%.
Sunday
A chance of snow. Mostly cloudy, with a high near 20. Chance of precipitation is 50%.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
Mostly cloudy, with a high near 22.
Monday Night
A chance of snow. Mostly cloudy, with a low around 14. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 27.
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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 10, 2025
Forecast Valid:
1pm EST Dec 10, 2025-6pm EST Dec 16, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation