National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

3 Miles E Sinnamahoning PA

Dense Fog Advisory March 4, 04:53am until March 4, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory March 4, 04:53am until March 4, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Today

    High: 49 °F

    Areas Dense
    Fog

  • Tonight

    Tonight: Rain likely, mainly after 5am. Patchy fog between 3am and 4am. Otherwise, cloudy, with a low around 41. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Slight Chance
    Rain then
    Rain Likely
    and Patchy
    Fog

  • Thursday

    Thursday: Rain. High near 51. Southeast wind 3 to 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 46. Southeast wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Rain

  • Friday

    Friday: A chance of rain, mainly before 1pm. Mostly cloudy, with a high near 56. South wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Chance Rain

  • Friday Night

    Friday Night: A chance of rain, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 49. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, then rain and possibly a thunderstorm after 1pm. High near 69. Chance of precipitation is 90%.

    High: 69 °F

    Chance Rain
    then Rain

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.

    Low: 41 °F

    Chance Rain

Detailed Forecast

Today
Areas of dense fog before 1pm. Otherwise, mostly cloudy, with a high near 49. Light and variable wind.
Tonight
Rain likely, mainly after 5am. Patchy fog between 3am and 4am. Otherwise, cloudy, with a low around 41. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain. High near 51. Southeast wind 3 to 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain. Low around 46. Southeast wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of rain, mainly before 1pm. Mostly cloudy, with a high near 56. South wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of rain, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 49. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of rain, then rain and possibly a thunderstorm after 1pm. High near 69. Chance of precipitation is 90%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 48.
Tuesday
A chance of rain. Mostly sunny, with a high near 69. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
1:34 am EST Mar 4, 2026
Forecast Valid:
4am EST Mar 4, 2026-6pm EDT Mar 10, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation