Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

70°F

21°C

Humidity 94%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Jul 3:55 am EDT
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • Overnight

    Overnight: A slight chance of showers before 5am.  Mostly cloudy, with a low around 66. Calm wind.  Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, mainly between 11am and 4pm. Some of the storms could produce heavy rainfall.  Mostly cloudy, with a high near 80. Light and variable wind.  Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    Heavy Rain

  • Monday Night

    Monday Night: Increasing clouds, with a low around 66. Calm wind.

    Low: 66 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 2pm.  Mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind.  Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. Light southeast wind.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm.  Mostly cloudy, with a high near 83. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am.  Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: A chance of thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm.  High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Chance
    T-storms then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am.  Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    Showers then
    Chance
    T-storms

Detailed Forecast

Overnight
A slight chance of showers before 5am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Monday
A chance of showers and thunderstorms, mainly between 11am and 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 80. Light and variable wind. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Increasing clouds, with a low around 66. Calm wind.
Tuesday
A slight chance of showers and thunderstorms after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 85. Calm wind. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 68. Light southeast wind.
Wednesday
A slight chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Thursday
A chance of thunderstorms before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 82. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 68. Chance of precipitation is 80%.
Friday
A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Friday Night
Showers likely. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
2:32 am EDT Jul 14, 2025
4am EDT Jul 14, 2025-6pm EDT Jul 20, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database