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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

21°F

-6°C

Humidity 93%
Wind Speed NW 9 G 17 mph
Barometer 29.55 in
Dewpoint 19°F (-7°C)
Visibility 1.50 mi
Wind Chill11°F (-12°C)
Last update 1 Jan 1:35 am EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

Winter Weather Advisory January 1, 01:43am until January 1, 04:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 1, 01:43am until January 1, 04:00pm

    NOW until 4:00pm Thu

    Winter Weather Advisory

  • Overnight

    Low: 11 °F

    Snow Showers

  • New Year's Day

    New Year's Day: A chance of snow showers, mainly between 7am and 2pm. Partly sunny, with a high near 19. Wind chill values as low as -5. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 19 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: A slight chance of snow showers after 11pm. Mostly cloudy, with a low around 14. West wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 14 °F

    Slight Chance
    Snow Showers

  • Friday

    Friday: Mostly cloudy, with a high near 25. West wind around 10 mph, with gusts as high as 23 mph.

    High: 25 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 16. West wind around 9 mph, with gusts as high as 22 mph.

    Low: 16 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow showers, mainly before 3am. Low around 11. Wind chill values as low as zero. Northwest wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.
New Year's Day
A chance of snow showers, mainly between 7am and 2pm. Partly sunny, with a high near 19. Wind chill values as low as -5. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of snow showers after 11pm. Mostly cloudy, with a low around 14. West wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy, with a high near 25. West wind around 10 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 16. West wind around 9 mph, with gusts as high as 22 mph.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Mostly cloudy, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
A chance of snow showers. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly cloudy, with a high near 38.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
1:26 am EST Jan 1, 2026
Forecast Valid:
1am EST Jan 1, 2026-6pm EST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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