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

32°F

0°C

Humidity 80%
Wind Speed NW 10 G 18 mph
Barometer 30.26 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 1 Dec 2:55 am EST
Extended Forecast for

2 Miles ENE Brockport PA

Winter Weather Advisory December 2, 01:00am until December 2, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: A chance of snow showers, mainly before 5am. Mostly cloudy, with a low around 23. Northwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 23 °F

    Chance Snow
    Showers

  • Monday

    Monday: Partly sunny, with a high near 32. North wind around 6 mph becoming calm in the afternoon.

    High: 32 °F

    Partly Sunny

  • Monday Night

    Monday Night: Snow, mainly after 4am. The snow could be heavy at times. Low around 23. Calm wind becoming southeast around 6 mph after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 23 °F

    Mostly Cloudy
    then Heavy
    Snow

  • Tuesday

    Tuesday: Snow, mainly before 1pm. The snow could be heavy at times. High near 35. Light and variable wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 35 °F

    Heavy Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 19. Northwest wind around 6 mph becoming calm in the evening.

    Low: 19 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Thursday

    Thursday: A chance of snow showers before 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.

    High: 30 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of snow showers, mainly before 5am. Mostly cloudy, with a low around 23. Northwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 32. North wind around 6 mph becoming calm in the afternoon.
Monday Night
Snow, mainly after 4am. The snow could be heavy at times. Low around 23. Calm wind becoming southeast around 6 mph after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Snow, mainly before 1pm. The snow could be heavy at times. High near 35. Light and variable wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Mostly cloudy, with a low around 19. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, with a high near 32.
Wednesday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Thursday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Thursday Night
Mostly cloudy, with a low around 9.
Friday
Partly sunny, with a high near 29.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
Saturday Night
A chance of snow showers. Cloudy, with a low around 25. Chance of precipitation is 50%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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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:
2:56 am EST Dec 1, 2025
Forecast Valid:
3am EST Dec 1, 2025-6pm EST Dec 7, 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