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

Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

76°F

24°C

Humidity 88%
Wind Speed Calm
Barometer 29.99 in (1015.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 26 Jun 5:53 pm EDT
Extended Forecast for

Mechanicsville PA

Flood Watch until June 27, 12:00am
Severe T-storm Watch until June 26, 10:00pm
Click here for hazard details and duration
Flood Watch
...
  •  
    Flood Watch until June 27, 12:00am
    Severe T-storm Watch until June 26, 10:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Tonight

    Low: 64 °F

    Severe
    Thunderstorms
    then Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 73. Southeast wind around 6 mph. Chance of precipitation is 40%.

    High: 73 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Cloudy, with a low around 65. Southeast wind 5 to 7 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 66. Light southwest wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Showers
    Likely then
    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 86. Chance of precipitation is 20%.

    High: 86 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms likely before 2am, then a chance of showers. Some of the storms could be severe. Mostly cloudy, with a low around 64. East wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 73. Southeast wind around 6 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Cloudy, with a low around 65. Southeast wind 5 to 7 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 66. Light southwest wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 86. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 67.
Monday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Tuesday Night
A chance of thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Mechanicsville PA
 40.98°N 76.6°W (Elev. 968 ft)
Last Update:
3:16 pm EDT Jun 26, 2025
Forecast Valid:
6pm EDT Jun 26, 2025-6pm EDT Jul 3, 2025
 
Forecast Discussion
 
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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