Dangerous, Record-Breaking Heat to Continue in the Central and Eastern U.S.; Severe Thunderstorms in the Upper Midwest; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will continue across most of the central and eastern U.S this week. Heat indices will exceed 100 degrees. Severe storms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians Thursday, with the primary threat large to very large hail. Critical fire weather to continue in the Four Corners Region Read More >

Hazardous Weather Conditions

Current conditions at

Altoona - Blair County Airport (KAOO)

Lat: 40.3°NLon: 78.32°WElev: 1467ft.

Fair

74°F

23°C

Humidity	91%
Wind Speed	SW 5 mph
Barometer	30.10 in (1017.8 mb)
Dewpoint	71°F (22°C)
Visibility	9.00 mi
Last update	2 Jul 3:53 am EDT

More Information:

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

Extended Forecast for

Mount Union PA

Heat Advisory July 3, 08:00pm until July 4, 08:00pm

Extreme Heat Warning July 2, 04:42am until July 3, 08:00pm

Click here for hazard details and duration

Heat Advisory

Extreme Heat Warning

Extreme Heat Warning July 2, 04:42am until July 3, 08:00pm
NOW until 8:00pm Fri
Extreme Heat Warning
Today
High: 101 °F
Hot
Tonight
Low: 76 °F
Mostly Clear
Friday
High: 99 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 75 °F
Slight Chance
T-storms then
Slight Chance
Showers
Independence Day
High: 97 °F
Mostly Sunny
then Slight
Chance
T-storms
Saturday Night
Low: 71 °F
Chance
T-storms
Sunday
High: 94 °F
Mostly Sunny
then Showers
Likely
Sunday Night
Low: 68 °F
Showers
Likely

Detailed Forecast

Today

Sunny and hot, with a high near 101. Heat index values as high as 107. Calm wind becoming west around 5 mph in the afternoon.

Tonight

Mostly clear, with a low around 76. Light southwest wind.

Friday

A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99. Heat index values as high as 108. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.

Friday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light west wind. Chance of precipitation is 20%.

Independence Day

A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

Saturday Night

A chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers likely and possibly a thunderstorm after 2pm. Partly sunny and hot, with a high near 94. Chance of precipitation is 70%.

Sunday Night

Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

Monday

A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%.

Monday Night

Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 66. Chance of precipitation is 80%.

Tuesday

Partly sunny, with a high near 88.

Tuesday Night

A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

Wednesday

A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.