Dangerous Heat to Continue through the Holiday Weekend; Severe Storms on Friday from the Plains to the Mid-Atlantic

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing across the eastern U.S. through the Independence Day holiday weekend. Peak heat indices of up to 115 degrees are possible. Isolated to scattered severe thunderstorms are possible from the northern/central Plains into the Midwest, Ohio Valley, and Mid-Atlantic Friday. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

80°F

27°C

Humidity 79%
Wind Speed Calm
Barometer 30.03 in (1016.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 2 Jul 11:53 pm EDT
Extended Forecast for

Shamokin Dam PA

Heat Advisory July 3, 08:00pm until July 4, 08:00pm
Extreme Heat Warning July 3, 12:07am until July 3, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  •  
    Extreme Heat Warning July 3, 12:07am until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming west 5 to 7 mph in the afternoon.  Chance of precipitation is 20%.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers between 11pm and midnight.  Increasing clouds, with a low around 75. West wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm.  Partly sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 97 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. Light north wind.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers before 8am, then showers likely and possibly a thunderstorm after 2pm.  Partly sunny, with a high near 89. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Partly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 2pm.  High near 81. Chance of precipitation is 80%.

    High: 81 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 75. Calm wind.
Friday
A slight chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of showers between 11pm and midnight. Increasing clouds, with a low around 75. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Independence Day
A chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 97. Heat index values as high as 103. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light north wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers before 8am, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Monday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 81. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 65. Chance of precipitation is 80%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Tuesday Night
A chance of thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Shamokin Dam PA
 40.85°N 76.83°W (Elev. 499 ft)
8:11 pm EDT Jul 2, 2026
12am EDT Jul 3, 2026-6pm EDT Jul 9, 2026
 
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