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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

6 Miles ESE Sinnamahoning PA

Dense Fog Advisory until February 19, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 19, 09:00am

    NOW until 9:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 4pm. Mostly cloudy, with a high near 47. Southeast wind 5 to 8 mph. Chance of precipitation is 40%.

    High: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 3am, then rain showers, possibly mixed with sleet. Low around 36. Southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. Little or no sleet accumulation expected.

    Low: 36 °F

    Chance
    Showers then
    Rain/Sleet

  • Friday

    Friday: Showers, mainly before 1pm. High near 47. Southeast wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Showers

  • Friday Night

    Friday Night: A chance of rain and snow showers before 10pm, then a chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 33. West wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Sunday

    Sunday: Snow showers. High near 36. Chance of precipitation is 80%.

    High: 36 °F

    Snow Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 40. Southwest wind around 6 mph becoming light and variable.
Thursday
A chance of showers after 4pm. Mostly cloudy, with a high near 47. Southeast wind 5 to 8 mph. Chance of precipitation is 40%.
Thursday Night
Rain showers before 3am, then rain showers, possibly mixed with sleet. Low around 36. Southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. Little or no sleet accumulation expected.
Friday
Showers, mainly before 1pm. High near 47. Southeast wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A chance of rain and snow showers before 10pm, then a chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 33. West wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly cloudy, with a high near 40.
Saturday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Sunday
Snow showers. High near 36. Chance of precipitation is 80%.
Sunday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 27. Chance of precipitation is 60%.
Monday
A chance of snow showers. Partly sunny, with a high near 35. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Sinnamahoning PA
 41.35°N 77.94°W (Elev. 1998 ft)
Last Update:
10:21 pm EST Feb 18, 2026
Forecast Valid:
12am EST Feb 19, 2026-6pm EST Feb 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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