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

21°F

-6°C

Humidity 86%
Wind Speed W 18 G 28 mph
Barometer 29.73 in
Dewpoint 18°F (-8°C)
Visibility 1.00 mi
Wind Chill6°F (-14°C)
Last update 30 Dec 4:15 am EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

Wind Advisory December 30, 04:36am until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 30, 04:36am until December 30, 12:00pm

    NOW until 12:00pm Tue

    Wind Advisory

  • Overnight

    Low: 18 °F

    Chance Snow
    Showers and
    Areas Blowing
    Snow

  • Tuesday

    Tuesday: Snow showers likely, mainly between 8am and 11am. Areas of blowing snow. Mostly cloudy, with a high near 24. West wind 15 to 18 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Showers
    Likely and
    Areas Blowing
    Snow

  • Tuesday Night

    Tuesday Night: A chance of snow showers, mainly after midnight. Areas of blowing snow before 9pm. Mostly cloudy, with a low around 17. West wind 11 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 40%.

    Low: 17 °F

    Chance Snow
    Showers and
    Areas Blowing
    Snow

  • Wednesday

    Wednesday: Snow showers, mainly after 1pm. High near 26. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 26 °F

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 1am. Low around 14. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 14 °F

    Snow Showers

  • New Year's Day

    New Year's Day: A chance of snow showers, mainly before 1pm. Partly sunny, 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 13.

    Low: 13 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of snow showers. Areas of blowing snow. Mostly cloudy, with a low around 18. Breezy, with a west wind around 20 mph, with gusts as high as 44 mph. Chance of precipitation is 30%.
Tuesday
Snow showers likely, mainly between 8am and 11am. Areas of blowing snow. Mostly cloudy, with a high near 24. West wind 15 to 18 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
A chance of snow showers, mainly after midnight. Areas of blowing snow before 9pm. Mostly cloudy, with a low around 17. West wind 11 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 40%.
Wednesday
Snow showers, mainly after 1pm. High near 26. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday Night
Snow showers, mainly before 1am. Low around 14. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
New Year's Day
A chance of snow showers, mainly before 1pm. Partly sunny, with a high near 20. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 13.
Friday
Mostly cloudy, with a high near 27.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Mostly cloudy, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
A chance of snow showers. Mostly cloudy, with a high near 33. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
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:
3:12 am EST Dec 30, 2025
Forecast Valid:
4am EST Dec 30, 2025-6pm EST Jan 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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