Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Johnstown - Cambria County Airport (KJST)

Lat: 40.31°NLon: 78.83°WElev: 2274ft.

Overcast

75°F

24°C

Humidity 90%
Wind Speed SW 8 mph
Barometer 30.13 in (1018.0 mb)
Dewpoint 72°F (22°C)
Visibility 8.00 mi
Last update 1 Jul 6:54 am EDT
Extended Forecast for

Geistown PA

Heat Advisory July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Patchy fog before 8am.  Otherwise, sunny, with a high near 91. West wind 5 to 9 mph.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. West wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 92. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 92 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. West wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 92. Calm wind becoming west 5 to 9 mph in the morning.

    High: 92 °F

    Hot

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 70. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 69. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm, mainly after 2pm.  Partly sunny, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 91. West wind 5 to 9 mph.
Tonight
Mostly clear, with a low around 70. West wind around 5 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 92. Calm wind becoming west 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 72. West wind 3 to 6 mph.
Friday
Sunny and hot, with a high near 92. Calm wind becoming west 5 to 9 mph in the morning.
Friday Night
A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Geistown PA
 40.29°N 78.87°W (Elev. 1896 ft)
6:11 am EDT Jul 1, 2026
7am EDT Jul 1, 2026-6pm EDT Jul 7, 2026
 
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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