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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fog/Mist

68°F

20°C

Humidity 96%
Wind Speed Calm
Barometer 30.02 in (1015.5 mb)
Dewpoint 67°F (19°C)
Visibility 2.50 mi
Last update 5 Jul 6:53 am EDT
Extended Forecast for

2 Miles NW Waterfall PA

Dense Fog Advisory until July 5, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until July 5, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Today

    High: 87 °F

    Areas Dense
    Fog then
    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before midnight, then showers likely. Some of the storms could be severe and produce heavy rainfall. Patchy fog after 11pm. Low around 68. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Monday

    Monday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 3pm, then showers likely and possibly a thunderstorm after 3pm. Areas of fog before 10am. Otherwise, cloudy, with a high near 79. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers
    Likely and
    Areas Fog

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Patchy fog before 11pm, then patchy fog after 1am. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 80. Light east wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers
    Likely and
    Patchy Fog

  • Tuesday Night

    Tuesday 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 64. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe and produce heavy rainfall. Areas of dense fog before 9am. High near 87. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before midnight, then showers likely. Some of the storms could be severe and produce heavy rainfall. Patchy fog after 11pm. Low around 68. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 3pm, then showers likely and possibly a thunderstorm after 3pm. Areas of fog before 10am. Otherwise, cloudy, with a high near 79. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Patchy fog before 11pm, then patchy fog after 1am. Low around 66. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 80. Light east wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday 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 64. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Wednesday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Waterfall PA
 40.13°N 78.09°W (Elev. 1089 ft)
Last Update:
6:11 am EDT Jul 5, 2026
Forecast Valid:
7am EDT Jul 5, 2026-6pm EDT Jul 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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