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

Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Overcast

32°F

0°C

Humidity 85%
Wind Speed N 10 mph
Barometer 29.75 in (1007.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 23 Feb 6:53 am EST
Extended Forecast for

Mechanicsville PA

Winter Weather Advisory February 23, 07:29am until February 23, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory February 23, 07:29am until February 23, 01:00pm

    NOW until 1:00pm Mon

    Winter Weather Advisory

  • Today

    High: 35 °F

    Chance Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 17. Northwest wind around 11 mph, with gusts as high as 25 mph.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 29. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.

    High: 29 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow, mainly after 1am. Low around 22. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 22 °F

    Slight Chance
    Snow then
    Snow

  • Wednesday

    Wednesday: A chance of snow, mixing with rain after 10am, then gradually ending. Mostly cloudy, with a high near 42. West wind around 10 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.

    High: 42 °F

    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Thursday

    Thursday: Snow likely after 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.

    High: 38 °F

    Partly Sunny
    then Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.

    Low: 26 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
A chance of snow, mainly before 10am. Cloudy, with a high near 35. North wind around 14 mph, with gusts as high as 33 mph. Chance of precipitation is 30%.
Tonight
Mostly cloudy, with a low around 17. Northwest wind around 11 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 29. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.
Tuesday Night
Snow, mainly after 1am. Low around 22. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday
A chance of snow, mixing with rain after 10am, then gradually ending. Mostly cloudy, with a high near 42. West wind around 10 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.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Snow likely after 1pm. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.
Friday
Mostly sunny, with a high near 39.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 43.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.57°W (Elev. 961 ft)
Last Update:
7:06 am EST Feb 23, 2026
Forecast Valid:
7am EST Feb 23, 2026-6pm EST Mar 1, 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