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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Partly Cloudy and Breezy

32°F

0°C

Humidity 44%
Wind Speed W 22 G 28 mph
Barometer 29.99 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 22 Jan 12:35 pm EST
Extended Forecast for

Grandview Park PA

Winter Storm Watch January 24, 10:00pm until January 26, 01:00pm
Cold Weather Advisory January 23, 01:00pm until January 24, 10:00am
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 31. West wind 14 to 16 mph, with gusts as high as 31 mph.

    High: 31 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 10. Wind chill values as low as zero. West wind 10 to 13 mph, with gusts as high as 26 mph.

    Low: 10 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 14 to 18 mph, with gusts as high as 31 mph.

    High: 16 °F⇓

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -4. Wind chill values as low as -15. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.

    Low: -4 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 10. Light and variable wind.

    High: 10 °F

    Cold

  • Saturday Night

    Saturday Night: Snow, mainly after 1am. Low around 5. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 5 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 15. Chance of precipitation is 100%.

    High: 15 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. Low around 9. Chance of precipitation is 90%.

    Low: 9 °F

    Snow

  • Monday

    Monday: A chance of snow. Mostly cloudy, with a high near 15. Chance of precipitation is 50%.

    High: 15 °F

    Chance Snow

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 31. West wind 14 to 16 mph, with gusts as high as 31 mph.
Tonight
Increasing clouds, with a low around 10. Wind chill values as low as zero. West wind 10 to 13 mph, with gusts as high as 26 mph.
Friday
Mostly cloudy, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 14 to 18 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, with a low around -4. Wind chill values as low as -15. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.
Saturday
Partly sunny and cold, with a high near 10. Light and variable wind.
Saturday Night
Snow, mainly after 1am. Low around 5. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday
Snow. The snow could be heavy at times. High near 15. Chance of precipitation is 100%.
Sunday Night
Snow. Low around 9. Chance of precipitation is 90%.
Monday
A chance of snow. Mostly cloudy, with a high near 15. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around -4.
Tuesday
Partly sunny, with a high near 12.
Tuesday Night
Mostly cloudy, with a low around 3.
Wednesday
A chance of snow. Mostly cloudy, with a high near 17. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grandview Park PA
 41.43°N 78.52°W (Elev. 1883 ft)
Last Update:
1:05 pm EST Jan 22, 2026
Forecast Valid:
2pm EST Jan 22, 2026-6pm EST Jan 28, 2026
 
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