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.

Partly Cloudy

9°F

-13°C

Humidity 66%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Last update 9 Dec 4:35 am 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

  • Today

    Today: A chance of snow, mainly after 3pm. Increasing clouds, with a high near 32. Wind chill values as low as zero. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 30%.

    High: 32 °F

    Partly Sunny
    then Chance
    Snow

  • Tonight

    Tonight: Snow, mainly after 4am. Low around 27. Southwest wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 27 °F

    Cloudy then
    Snow

  • Wednesday

    Wednesday: Snow before 10am, then snow, possibly mixed with rain. High near 38. Southwest wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    High: 38 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow showers. Low around 20. West wind 10 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 20 °F

    Snow Showers

  • Thursday

    Thursday: A chance of snow showers. Mostly cloudy, with a high near 26. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 18. Chance of precipitation is 40%.

    Low: 18 °F

    Chance Snow
    Showers

  • Friday

    Friday: A chance of snow showers after 1pm. Mostly cloudy, with a high near 28. Chance of precipitation is 40%.

    High: 28 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Friday Night

    Friday Night: Snow likely. Mostly cloudy, with a low around 17. Chance of precipitation is 70%.

    Low: 17 °F

    Snow Likely

  • Saturday

    Saturday: Snow likely. Mostly cloudy, with a high near 27. Chance of precipitation is 60%.

    High: 27 °F

    Snow Likely

Detailed Forecast

Today
A chance of snow, mainly after 3pm. Increasing clouds, with a high near 32. Wind chill values as low as zero. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Tonight
Snow, mainly after 4am. Low around 27. Southwest wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Snow before 10am, then snow, possibly mixed with rain. High near 38. Southwest wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow showers. Low around 20. West wind 10 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 26. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 18. Chance of precipitation is 40%.
Friday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 28. Chance of precipitation is 40%.
Friday Night
Snow likely. Mostly cloudy, with a low around 17. Chance of precipitation is 70%.
Saturday
Snow likely. Mostly cloudy, with a high near 27. Chance of precipitation is 60%.
Saturday Night
Snow likely. Cloudy, with a low around 13. Chance of precipitation is 70%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 21. Chance of precipitation is 50%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 7. Chance of precipitation is 30%.
Monday
A chance of snow showers. Partly sunny, with a high near 23. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Brockport PA
 41.29°N 78.69°W (Elev. 1585 ft)
Last Update:
4:34 am EST Dec 9, 2025
Forecast Valid:
4am EST Dec 9, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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