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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Mostly Cloudy

41°F

5°C

Humidity 70%
Wind Speed W 18 G 24 mph
Barometer 29.35 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 29 Dec 8:35 am EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Wind Advisory December 29, 08:44am until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 29, 08:44am until December 30, 12:00pm

    NOW until 12:00pm Tue

    Wind Advisory

  • Today

    High: 43 °F⇓

    Chance
    Rain/Snow
    then Snow
    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Snow showers likely, mainly before midnight. Patchy blowing snow before 1am. Mostly cloudy, with a low around 18. Breezy, with a west wind 22 to 24 mph, with gusts as high as 49 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 18 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Tuesday

    Tuesday: A chance of snow showers, mainly between 7am and 1pm. Patchy blowing snow between 8am and 11am. Mostly cloudy, with a high near 23. Breezy, with a west wind 17 to 22 mph, with gusts as high as 46 mph. Chance of precipitation is 40%.

    High: 23 °F

    Chance Snow
    Showers and
    Patchy
    Blowing Snow

  • Tuesday Night

    Tuesday Night: A chance of snow showers. Mostly cloudy, with a low around 18. West wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 18 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Snow showers, mainly after 1pm. High near 27. West wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 27 °F

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 1am. Low around 12. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 12 °F

    Snow Showers

  • New Year's Day

    New Year's Day: A chance of snow showers before 1pm. Mostly cloudy, with a high near 19. Chance of precipitation is 30%.

    High: 19 °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 rain showers before 10am, then snow showers likely. Mostly cloudy, with a temperature falling to around 24 by 4pm. Breezy, with a west wind 16 to 22 mph, with gusts as high as 50 mph. Chance of precipitation is 60%. 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 18. Breezy, with a west wind 22 to 24 mph, with gusts as high as 49 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Tuesday
A chance of snow showers, mainly between 7am and 1pm. Patchy blowing snow between 8am and 11am. Mostly cloudy, with a high near 23. Breezy, with a west wind 17 to 22 mph, with gusts as high as 46 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 18. West wind 14 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday
Snow showers, mainly after 1pm. High near 27. West wind around 14 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, mainly before 1am. Low around 12. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
New Year's Day
A chance of snow showers before 1pm. Mostly cloudy, with a high near 19. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Mostly cloudy, with a high near 20.
Friday Night
Mostly cloudy, with a low around 14.
Saturday
Mostly cloudy, with a high near 25.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Partly sunny, 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:
7:30 am EST Dec 29, 2025
Forecast Valid:
8am EST Dec 29, 2025-6pm EST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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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