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Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

25°F

-4°C

Humidity 63%
Wind Speed W 16 G 26 mph
Barometer 29.80 in
Dewpoint 14°F (-10°C)
Visibility 7.00 mi
Wind Chill12°F (-11°C)
Last update 19 Jan 2:35 pm EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

Cold Weather Advisory January 19, 09:00pm until January 20, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • M.L.King Day

    M.L.King Day: Snow showers likely, mainly before 4pm. The snow could be heavy at times. Mostly cloudy, with a high near 24. West wind around 17 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than a half inch possible.

    High: 24 °F

    Heavy Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 2. Wind chill values as low as -15. West wind 13 to 17 mph, with gusts as high as 36 mph.

    Low: 2 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 12. Wind chill values as low as -15. West wind 10 to 14 mph, with gusts as high as 30 mph.

    High: 12 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 7. Wind chill values as low as -5. West wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 7 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Snow showers likely after 1pm. Mostly cloudy, with a high near 32. South wind 7 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 32 °F

    Partly Sunny
    then Snow
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 24 °F

    Snow Likely

  • Thursday

    Thursday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 17.

    High: 17 °F

    Partly Sunny

Detailed Forecast

M.L.King Day
Snow showers likely, mainly before 4pm. The snow could be heavy at times. Mostly cloudy, with a high near 24. West wind around 17 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Mostly cloudy, with a low around 2. Wind chill values as low as -15. West wind 13 to 17 mph, with gusts as high as 36 mph.
Tuesday
Mostly sunny, with a high near 12. Wind chill values as low as -15. West wind 10 to 14 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 7. Wind chill values as low as -5. West wind 6 to 8 mph, with gusts as high as 20 mph.
Wednesday
Snow showers likely after 1pm. Mostly cloudy, with a high near 32. South wind 7 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Thursday
Partly sunny, with a high near 31.
Thursday Night
Partly cloudy, with a low around 10.
Friday
Partly sunny, with a high near 17.
Friday Night
Mostly cloudy, with a low around -1.
Saturday
Mostly cloudy and cold, with a high near 10.
Saturday Night
Mostly cloudy, with a low around -1.
Sunday
A chance of snow showers. Partly sunny, with a high near 13. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
1:16 pm EST Jan 19, 2026
Forecast Valid:
2pm EST Jan 19, 2026-6pm EST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation