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Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fog

34°F

1°C

Humidity 97%
Wind Speed Calm
Barometer 30.00 in (1017.1 mb)
Dewpoint 33°F (1°C)
Visibility 0.25 mi
Last update 16 Feb 4:53 am EST
Extended Forecast for

4 Miles N Williamsburg PA

Dense Fog Advisory until February 16, 11:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until February 16, 11:00am

    NOW until 11:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 33 °F

    Areas Dense
    Fog

  • Washington's Birthday

    Washington's Birthday: Areas of dense fog before 10am. Otherwise, partly sunny, with a high near 47. Calm wind.

    High: 47 °F

    Areas Dense
    Fog then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 53. Calm wind.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 38. Calm wind. Chance of precipitation is 30%.

    Low: 38 °F

    Patchy Fog
    then Chance
    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain likely. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 56. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain Likely
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Partly cloudy, with a low around 42. Chance of precipitation is 30%.

    Low: 42 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain after 1pm. Partly sunny, with a high near 56. Chance of precipitation is 30%.

    High: 56 °F

    Mostly Sunny
    then Chance
    Rain

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly cloudy, with a low around 33. Calm wind.
Washington's Birthday
Areas of dense fog before 10am. Otherwise, partly sunny, with a high near 47. Calm wind.
Monday Night
Mostly cloudy, with a low around 33. Calm wind.
Tuesday
Partly sunny, with a high near 53. Calm wind.
Tuesday Night
A chance of rain after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 38. Calm wind. Chance of precipitation is 30%.
Wednesday
Rain likely. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 56. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain before 1am. Partly cloudy, with a low around 42. Chance of precipitation is 30%.
Thursday
A chance of rain after 1pm. Partly sunny, with a high near 56. Chance of precipitation is 30%.
Thursday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Friday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.
Saturday
A chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Sunday
A chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Williamsburg PA
 40.52°N 78.2°W (Elev. 997 ft)
Last Update:
1:05 am EST Feb 16, 2026
Forecast Valid:
5am EST Feb 16, 2026-6pm EST Feb 22, 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