Dangerous Heat Building in the West; Severe Storms in the Upper Midwest

A long duration heat wave will build across the Southwest, California, and Pacific Northwest. Dangerous heat is also forecast for the Great Basin and South Plains. Severe storms in the Upper Midwest may have locally heavy rain, damaging winds, and very large hail. Heavy rain and flooding will also be possible in the Deep South and Appalachians. Read More >

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Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fog/Mist

69°F

21°C

Humidity	93%
Wind Speed	E 5 mph
Barometer	30.10 in (1018.1 mb)
Dewpoint	67°F (19°C)
Visibility	1.50 mi
Last update	14 Aug 6:53 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

4 Miles WNW Williamsburg PA

Today

Patchy Fog
then Chance
T-storms
High: 87 °F
Tonight

Chance
T-storms then
Mostly Cloudy
Low: 66 °F
Saturday

Mostly Cloudy
then Chance
Showers
High: 81 °F
Saturday
Night

Showers
Likely
Low: 64 °F
Sunday

Chance
Showers
High: 77 °F
Sunday
Night

Slight Chance
Showers
Low: 62 °F
Monday

Partly Sunny
High: 84 °F
Monday
Night

Mostly Clear
Low: 58 °F
Tuesday

Sunny
High: 83 °F

Detailed Forecast

Today

A chance of showers and thunderstorms, mainly after 4pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 87. Calm wind becoming east 5 to 7 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Mostly cloudy, with a low around 66. East wind 3 to 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A chance of showers, mainly after 4pm. Mostly cloudy, with a high near 81. East wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night

Showers likely, mainly after 8pm. Cloudy, with a low around 64. East wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Sunday

A chance of showers, mainly before 2pm. Mostly cloudy, with a high near 77. East wind around 6 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night

A slight chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 20%.

Monday

Partly sunny, with a high near 84.

Monday Night

Mostly clear, with a low around 58.

Tuesday

Sunny, with a high near 83.

Tuesday Night

Partly cloudy, with a low around 57.

Wednesday

Partly sunny, with a high near 83.