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

Two Pacific Storms To Impact the Western U.S. This Week

Two Pacific storms will impact the western U.S. this week with low elevation rain, mountain snow, and gusty winds. The second storm arriving Tuesday night into Wednesday may bring heavy to excessive rainfall and possible flooding for coastal central and southern California, while heavy mountain snow is possible across the Sierra Nevada mountains. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Overcast

45°F

7°C

Humidity 58%
Wind Speed N 7 mph
Barometer 30.26 in (1024.9 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 15 Nov 4:53 pm EST
Extended Forecast for

Herndon PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Light northwest wind.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 53. Calm wind becoming north around 6 mph.

    High: 53 °F

    Partly Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 27. Calm wind.

    Low: 27 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, sunny, with a high near 57. Calm wind.

    High: 57 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 29. Calm wind.

    Low: 29 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. Light northwest wind.
Monday
Partly sunny, with a high near 53. Calm wind becoming north around 6 mph.
Monday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 27. Calm wind.
Tuesday
Patchy fog before 10am. Otherwise, sunny, with a high near 57. Calm wind.
Tuesday Night
Clear, with a low around 29. Calm wind.
Wednesday
Sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 30.
Thursday
Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 35.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 37.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Herndon PA
 40.72°N 76.85°W (Elev. 397 ft)
Last Update:
1:36 pm EST Nov 15, 2026
Forecast Valid:
5pm EST Nov 15, 2026-6pm EST Nov 22, 2026
 
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