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Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fair

72°F

22°C

Humidity 91%
Wind Speed Calm
Barometer 30.19 in (1021.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 23 Jun 3:53 am EDT
Extended Forecast for

Shirleysburg PA

Heat Advisory June 23, 04:53am until June 25, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 23, 04:53am until June 25, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Today

    High: 99 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 74. Calm wind.

    Low: 74 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 106. Light northwest wind.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Calm wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 72. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.

    High: 92 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday 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 71. Chance of precipitation is 60%.

    Low: 71 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Today
Sunny and hot, with a high near 99. Heat index values as high as 109. Calm wind becoming northwest around 5 mph in the afternoon.
Tonight
Clear, with a low around 74. Calm wind.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 106. Light northwest wind.
Tuesday Night
Mostly clear, with a low around 73. Calm wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Calm wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 72. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
Thursday 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 71. Chance of precipitation is 60%.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 60%.
Friday 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 71. Chance of precipitation is 60%.
Saturday
Showers likely. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Shirleysburg PA
 40.31°N 77.88°W (Elev. 600 ft)
Last Update:
2:44 am EDT Jun 23, 2025
Forecast Valid:
4am EDT Jun 23, 2025-6pm EDT Jun 29, 2025
 
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