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

Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Rain Fog/Mist

40°F

4°C

Humidity 100%
Wind Speed Calm
Barometer 30.13 in (1021.2 mb)
Dewpoint 40°F (4°C)
Visibility 2.50 mi
Last update 5 Mar 3:53 am EST
Extended Forecast for

4 Miles WNW Williamsburg PA

Dense Fog Advisory March 5, 04:47am until March 5, 07:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 5, 04:47am until March 5, 07:00am

    NOW until 7:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 40 °F

    Rain and
    Areas Dense
    Fog

  • Thursday

    Thursday: Rain. Areas of dense fog before 2pm, then patchy dense fog after 4pm. High near 51. Light east wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Rain and
    Areas Dense
    Fog

  • Thursday Night

    Thursday Night: Rain, mainly before 11pm. Low around 46. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Rain then
    Chance Rain

  • Friday

    Friday: A chance of rain, mainly after 1pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance Rain
    and Patchy
    Fog

  • Friday Night

    Friday Night: A slight chance of rain before 1am. Mostly cloudy, with a low around 50. Light southeast wind. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 1pm, then showers between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 71. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Chance Rain
    then Showers

  • Saturday Night

    Saturday Night: Showers before 1am, then a chance of rain after 1am. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Overnight
Rain. Areas of dense fog. Low around 40. Calm wind. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain. Areas of dense fog before 2pm, then patchy dense fog after 4pm. High near 51. Light east wind. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain, mainly before 11pm. Low around 46. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of rain, mainly after 1pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A slight chance of rain before 1am. Mostly cloudy, with a low around 50. Light southeast wind. Chance of precipitation is 20%.
Saturday
A chance of rain before 1pm, then showers between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 71. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers before 1am, then a chance of rain after 1am. Low around 48. Chance of precipitation is 80%.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 50.
Tuesday
A chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Wednesday
Showers likely. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Williamsburg PA
 40.48°N 78.26°W (Elev. 902 ft)
Last Update:
2:26 am EST Mar 5, 2026
Forecast Valid:
4am EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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