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

30°F

-1°C

Humidity 75%
Wind Speed W 14 G 29 mph
Barometer 29.92 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 27 Nov 7:35 pm EST
Extended Forecast for

10 Miles NNW Cross Fork PA

Lake Effect Snow Warning November 27, 08:01pm until November 29, 01:00am
Click here for hazard details and duration
Lake Effect Snow Warning
  •  
    Lake Effect Snow Warning November 27, 08:01pm until November 29, 01:00am

    NOW until 1:00am Sat

    Lake Effect Snow Warning

  • Tonight

    Low: 25 °F

    Heavy Snow

  • Friday

    Friday: Frequent snow showers, mainly before 1pm. The snow could be heavy at times. High near 34. West wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Heavy Snow

  • Friday Night

    Friday Night: Scattered snow showers. Mostly cloudy, with a low around 23. West wind 8 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Scattered
    Snow Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 34. West wind around 6 mph becoming calm in the afternoon.

    High: 34 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Snow, mainly after 1am. Low around 25. Light southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 25 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: Rain and snow. High near 38. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    High: 38 °F

    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow. Cloudy, with a low around 24. Chance of precipitation is 50%.

    Low: 24 °F

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Frequent snow showers, mainly after 10pm. The snow could be heavy at times. Low around 25. West wind around 14 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 2 inches possible.
Friday
Frequent snow showers, mainly before 1pm. The snow could be heavy at times. High near 34. West wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday Night
Scattered snow showers. Mostly cloudy, with a low around 23. West wind 8 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Saturday
Mostly cloudy, with a high near 34. West wind around 6 mph becoming calm in the afternoon.
Saturday Night
Snow, mainly after 1am. Low around 25. Light southeast wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Sunday
Rain and snow. High near 38. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Sunday Night
A chance of snow. Cloudy, with a low around 24. Chance of precipitation is 50%.
Monday
Mostly cloudy, with a high near 32.
Monday Night
A chance of snow after 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Tuesday
A chance of snow. Mostly cloudy, with a high near 33. Chance of precipitation is 50%.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Wednesday
Mostly cloudy, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
Mostly cloudy, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNW Cross Fork PA
 41.61°N 77.9°W (Elev. 1647 ft)
Last Update:
7:06 pm EST Nov 27, 2025
Forecast Valid:
8pm EST Nov 27, 2025-6pm EST Dec 4, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation