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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 | 75% |
| Wind Speed | SW 10 G 16 mph |
| Barometer | 29.65 in |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 26°F (-3°C) |
| Last update | 10 Dec 2:35 am EST |
Extended Forecast for
3 Miles NW Sinnamahoning PA
Winter Weather Advisory December 10, 02:39am until December 12, 04:00am
NOW until 4:00am Fri

Winter Weather Advisory
Overnight

Low: 25 °F
Snow Likely
Wednesday
High: 36 °F
Heavy Snow
then
Rain/SnowWednesday Night
Low: 19 °F
Snow Likely
then Chance
Snow ShowersThursday

High: 24 °F
Heavy Snow
Thursday Night

Low: 20 °F
Chance Snow
ShowersFriday

High: 27 °F
Chance Snow
ShowersFriday Night

Low: 17 °F
Chance Snow
ShowersSaturday

High: 26 °F
Chance Snow
Showers
Detailed Forecast
Overnight
Snow likely, mainly after 5am. Cloudy, with a low around 25. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.
Wednesday
Rain and snow, becoming all snow after 2pm, then gradually ending. The snow could be heavy at times. High near 36. Southwest wind around 11 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Wednesday Night
Snow likely before 10pm, then a chance of snow showers after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 19. Northwest wind around 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely, mainly before 1pm. The snow could be heavy at times. Mostly cloudy, with a high near 24. West wind around 16 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 20. West wind 11 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Friday
A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 27. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 50%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.
Saturday Night
Snow showers likely. Cloudy, with a low around 14. Chance of precipitation is 60%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 20. Chance of precipitation is 50%.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 11. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 22.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 27.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles NW Sinnamahoning PA
41.41°N 78.11°W (Elev. 2169 ft)
41.41°N 78.11°W (Elev. 2169 ft)
2:21 am EST Dec 10, 2025
2am EST Dec 10, 2025-6pm EST Dec 16, 2025



