Coastal Storm Impacting the Mid-Atlantic; Heavy Rain and Below Average Temperatures Over the Plains

A coastal storm will bring widespread rain, gusty winds, shallow coastal flooding, rip currents, large surf and possible areal flooding over the Mid-Atlantic region into Wednesday. Heavy rains and thunderstorms, some severe, persist across the Plains. Above average temperatures expected across much of the CONUS, except over the Plains. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

59°F

15°C

Humidity 93%
Wind Speed Calm
Barometer 30.16 in (1020.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 17 Sep 12:53 am EDT
Extended Forecast for

Herndon PA

  • Overnight

    Overnight: A slight chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 56. Calm wind.  Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Mostly cloudy, with a high near 72. North wind 3 to 6 mph.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Patchy fog after 9pm.  Otherwise, mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Patchy Fog

  • Thursday

    Thursday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 83. Calm wind.

    High: 83 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 49.

    Low: 49 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 56. Calm wind. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North wind 3 to 6 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 59. Calm wind.
Thursday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind.
Thursday Night
Mostly clear, with a low around 57. Calm wind.
Friday
Sunny, with a high near 82.
Friday Night
Clear, with a low around 49.
Saturday
Sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Partly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon PA
 40.72°N 76.85°W (Elev. 397 ft)
5:32 pm EDT Sep 16, 2025
12am EDT Sep 17, 2025-6pm EDT Sep 23, 2025
 
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Additional Resources

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