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

32°F

0°C

Humidity 60%
Wind Speed W 16 G 31 mph
Barometer 30.03 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 28 Nov 1:55 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Winter Weather Advisory November 28, 02:18pm until November 29, 01:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory November 28, 02:18pm until November 29, 01:00am

    NOW until 1:00am Sat

    Winter Weather Advisory

  • This Afternoon

    High: 32 °F

    Heavy Snow

  • Tonight

    Tonight: Scattered snow showers, mainly before 10pm. Mostly cloudy, with a low around 23. West wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 23 °F

    Scattered
    Snow Showers

  • Saturday

    Saturday: Partly sunny, with a high near 33. West wind 5 to 8 mph becoming calm in the afternoon.

    High: 33 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow, mainly after 1am. Low around 28. Southeast wind 5 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 28 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: Snow before 1pm, then rain likely, possibly mixed with snow. High near 38. South wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 38 °F

    Snow then
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow. Cloudy, with a low around 24. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 24 °F

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of snow after 1am. Cloudy, with a low around 23. Chance of precipitation is 50%.

    Low: 23 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

This Afternoon
Frequent snow showers. The snow could be heavy at times. High near 32. West wind around 14 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. Total daytime snow accumulation of around an inch possible.
Tonight
Scattered snow showers, mainly before 10pm. Mostly cloudy, with a low around 23. West wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 33. West wind 5 to 8 mph becoming calm in the afternoon.
Saturday Night
Snow, mainly after 1am. Low around 28. Southeast wind 5 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Sunday
Snow before 1pm, then rain likely, possibly mixed with snow. High near 38. South wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
A chance of snow. Cloudy, with a low around 24. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 30.
Monday Night
A chance of snow after 1am. Cloudy, with a low around 23. Chance of precipitation is 50%.
Tuesday
Snow likely. Mostly cloudy, with a high near 31. Chance of precipitation is 70%.
Tuesday Night
A chance of snow before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a high near 31.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Basemap Options
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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 Nov 28, 2025
Forecast Valid:
2pm EST Nov 28, 2025-6pm EST Dec 4, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation