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

Dangerous, Heat Wave Persists in the Eastern U.S.; Severe Weather Expected in the Central Plains and Mid-Atlantic

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorms are expected to produce damaging wind gusts from the Upper Ohio Valley into the Mid Atlantic, and across the central Great Plains this afternoon and evening. Large hail and heavy rain is also possible across the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

70°F

21°C

Humidity 87%
Wind Speed Calm
Barometer 29.96 in (1014.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 4 Jul 4:53 am EDT
Extended Forecast for

Linntown PA

Heat Advisory July 4, 05:29am until July 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 4, 05:29am until July 4, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Independence Day

    High: 96 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could be severe. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 4pm. Some of the storms could produce heavy rainfall. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 86. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    Showers and
    Patchy Fog
    then Heavy
    Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 7pm, then showers and possibly a thunderstorm between 7pm and 5am, then showers after 5am. Some of the storms could produce heavy rainfall. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 66 °F

    Heavy Rain
    then Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 11am. High near 79. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Independence Day
A slight chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Mostly sunny and hot, with a high near 96. Heat index values as high as 104. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could be severe. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms likely, mainly after 4pm. Some of the storms could produce heavy rainfall. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 86. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms likely before 7pm, then showers and possibly a thunderstorm between 7pm and 5am, then showers after 5am. Some of the storms could produce heavy rainfall. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday
Showers, with thunderstorms also possible after 11am. High near 79. Southeast wind 3 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Linntown PA
 40.94°N 76.9°W (Elev. 499 ft)
Last Update:
3:35 am EDT Jul 4, 2026
Forecast Valid:
5am EDT Jul 4, 2026-6pm EDT Jul 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation