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

34°F

1°C

Humidity 65%
Wind Speed SW 10 G 22 mph
Barometer 29.73 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 9 Dec 9:35 pm EST
Extended Forecast for

2 Miles ENE Brockport PA

Winter Weather Advisory December 10, 01:00am until December 10, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Snow likely, mainly after 4am. Mostly cloudy, with a low around 28. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of around an inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow before 2pm, then snow likely, possibly mixed with rain between 2pm and 4pm, then snow after 4pm. High near 37. Southwest wind around 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 37 °F

    Snow then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow showers. Low around 19. West wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Snow Showers

  • Thursday

    Thursday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 26. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 26 °F

    Snow Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 19. West wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow
    Showers

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 30%.

    High: 29 °F

    Chance Snow

  • Friday Night

    Friday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.

    Low: 17 °F

    Snow Likely

  • Saturday

    Saturday: Snow likely, mainly after 1pm. Mostly cloudy, with a high near 29. Chance of precipitation is 60%.

    High: 29 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 16. Chance of precipitation is 80%.

    Low: 16 °F

    Snow

Detailed Forecast

Tonight
Snow likely, mainly after 4am. Mostly cloudy, with a low around 28. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of around an inch possible.
Wednesday
Snow before 2pm, then snow likely, possibly mixed with rain between 2pm and 4pm, then snow after 4pm. High near 37. Southwest wind around 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow showers. Low around 19. West wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 26. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 19. West wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Friday
A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 30%.
Friday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.
Saturday
Snow likely, mainly after 1pm. Mostly cloudy, with a high near 29. Chance of precipitation is 60%.
Saturday Night
Snow. Low around 16. Chance of precipitation is 80%.
Sunday
Snow likely, mainly before 1pm. Mostly cloudy, with a high near 23. Chance of precipitation is 60%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 8. Chance of precipitation is 40%.
Monday
Mostly cloudy, with a high near 24.
Monday Night
A chance of snow. Mostly cloudy, with a low around 11. Chance of precipitation is 40%.
Tuesday
Mostly cloudy, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Brockport PA
 41.29°N 78.69°W (Elev. 1585 ft)
Last Update:
7:06 pm EST Dec 9, 2025
Forecast Valid:
9pm EST Dec 9, 2025-6pm EST Dec 16, 2025
 
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