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Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Overcast

70°F

21°C

Humidity 90%
Wind Speed N 6 mph
Barometer 30.00 in (1015.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 20 Aug 11:53 am EDT
Extended Forecast for

2 Miles ENE Northumberland PA

Flood Watch August 20, 12:55pm until August 20, 08:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch August 20, 12:55pm until August 20, 08:00pm

    NOW until 8:00pm Thu

    Flood Watch

  • This Afternoon

    High: 72 °F

    Heavy Rain

  • Tonight

    Tonight: Rain likely, mainly before 7pm. Patchy fog after 2am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 57. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Rain Likely
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80. Calm wind.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 63. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 78. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely and
    Patchy Fog

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers after 2pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 78. Chance of precipitation is 30%.

    High: 78 °F

    Areas Fog
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 8pm. Mostly clear, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

This Afternoon
Rain, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 72. Calm wind becoming north around 5 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tonight
Rain likely, mainly before 7pm. Patchy fog after 2am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 57. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 80. Calm wind.
Friday Night
A chance of showers after 2am. Patchy fog after 2am. Otherwise, increasing clouds, with a low around 63. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 78. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers after 2pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 78. Chance of precipitation is 30%.
Sunday Night
A chance of showers before 8pm. Mostly clear, with a low around 58. Chance of precipitation is 30%.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Northumberland PA
 40.91°N 76.76°W (Elev. 499 ft)
Last Update:
12:26 pm EDT Aug 20, 2026
Forecast Valid:
12pm EDT Aug 20, 2026-6pm EDT Aug 26, 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