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

Severe Thunderstorms and Heavy Rainfall Today from the Central Plains into the Tennessee Valley

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into portions of the Southeast today. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys today. Read More >

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fog/Mist

65°F

18°C

Humidity 97%
Wind Speed Calm
Barometer 30.13 in (1019.5 mb)
Dewpoint 64°F (18°C)
Visibility 5.00 mi
Last update 12 Jul 4:53 am EDT
Extended Forecast for

4 Miles NNE Williamsburg PA

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. Light and variable wind.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 63. Light south wind.

    Low: 63 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 94.

    High: 94 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. Light and variable wind.
Monday
Patchy fog before 9am. Otherwise, sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Clear, with a low around 63. Light south wind.
Tuesday
Sunny and hot, with a high near 93. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Sunny and hot, with a high near 94.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 65.
Friday
Mostly sunny, with a high near 87.
Friday Night
Partly cloudy, with a low around 65.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Williamsburg PA
 40.51°N 78.17°W (Elev. 804 ft)
Last Update:
3:20 am EDT Jul 12, 2026
Forecast Valid:
5am EDT Jul 12, 2026-6pm EDT Jul 18, 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