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

36°F

2°C

Humidity 70%
Wind Speed W 20 G 41 mph
Barometer 29.40 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 29 Dec 11:15 am EST
Extended Forecast for

4 Miles SE Sinnamahoning PA

Wind Advisory December 29, 11:32am until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 29, 11:32am until December 30, 12:00pm

    NOW until 12:00pm Tue

    Wind Advisory

  • Today

    High: 42 °F⇓

    Chance Snow
    Showers

  • Tonight

    Tonight: Snow showers likely, mainly before midnight. Patchy blowing snow before 1am. Mostly cloudy, with a low around 19. Breezy, with a west wind around 21 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Tuesday

    Tuesday: A chance of snow showers between 7am and 1pm. Mostly cloudy, with a high near 24. West wind 14 to 18 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.

    High: 24 °F

    Chance Snow
    Showers

  • Tuesday Night

    Tuesday Night: A chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 19. West wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.

    Low: 19 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Snow showers, mainly after 1pm. High near 28. West wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 28 °F

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 13 °F

    Snow Showers
    Likely

  • New Year's Day

    New Year's Day: A chance of snow showers before 1pm. Mostly cloudy, with a high near 20. Chance of precipitation is 30%.

    High: 20 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Today
A chance of snow showers, mainly after 4pm. Mostly cloudy, with a temperature falling to around 25 by 4pm. West wind 15 to 17 mph, with gusts as high as 49 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow showers likely, mainly before midnight. Patchy blowing snow before 1am. Mostly cloudy, with a low around 19. Breezy, with a west wind around 21 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Tuesday
A chance of snow showers between 7am and 1pm. Mostly cloudy, with a high near 24. West wind 14 to 18 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of snow showers, mainly after 1am. Mostly cloudy, with a low around 19. West wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.
Wednesday
Snow showers, mainly after 1pm. High near 28. West wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
New Year's Day
A chance of snow showers before 1pm. Mostly cloudy, with a high near 20. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Partly sunny, with a high near 21.
Friday Night
Mostly cloudy, with a low around 14.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
9:04 am EST Dec 29, 2025
Forecast Valid:
11am EST Dec 29, 2025-6pm EST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation