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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Hazardous Weather Conditions

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Fair

92°F

33°C

Humidity 64%
Wind Speed S 13 mph
Barometer 29.98 in
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 21 Aug 5:35 pm CDT
Extended Forecast for

Austwell TX

Heat Advisory August 21, 05:40pm until August 21, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory August 21, 05:40pm until August 21, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 78 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 92. Heat index values as high as 105. Light and variable wind becoming south southeast 6 to 11 mph in the afternoon.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. South wind 5 to 11 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 91. Heat index values as high as 103. Light south southwest wind becoming south southeast 6 to 11 mph in the afternoon.

    High: 91 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 79. South southeast wind 6 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91. South southwest wind 5 to 11 mph.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South southeast wind 6 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Light south southwest wind becoming south southeast 8 to 13 mph in the morning.

    High: 93 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 78. South wind 6 to 11 mph.
Saturday
Sunny, with a high near 92. Heat index values as high as 105. Light and variable wind becoming south southeast 6 to 11 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 77. South wind 5 to 11 mph.
Sunday
Sunny, with a high near 91. Heat index values as high as 103. Light south southwest wind becoming south southeast 6 to 11 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 79. South southeast wind 6 to 10 mph.
Monday
Sunny, with a high near 91. South southwest wind 5 to 11 mph.
Monday Night
Mostly clear, with a low around 78. South southeast wind 6 to 10 mph.
Tuesday
Sunny, with a high near 93. Light south southwest wind becoming south southeast 8 to 13 mph in the morning.
Tuesday Night
Clear, with a low around 78. South southeast wind 7 to 11 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 78.
Friday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Austwell TX
 28.39°N 96.84°W
Last Update:
1:46 pm CDT Aug 21, 2026
Forecast Valid:
5pm CDT Aug 21, 2026-6pm CDT Aug 28, 2026
 
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Additional Resources

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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