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.

Partly Cloudy

96°F

36°C

Humidity 38%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 22 Aug 1:15 pm CDT
Extended Forecast for

Tivoli TX

Heat Advisory until August 22, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 22, 07:00pm

    NOW until 7:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 96 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph becoming light south southwest after midnight.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96. Heat index values as high as 106. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. South southeast wind 5 to 9 mph becoming light south after midnight.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95. Light south southwest wind becoming south southeast 6 to 11 mph in the morning.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 77. South southeast wind 6 to 10 mph.

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Light south southwest wind becoming south southeast 6 to 11 mph in the morning.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 76. South southeast wind 7 to 11 mph.

    Low: 76 °F

    Clear

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 96. Heat index values as high as 109. Southeast wind 6 to 10 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph becoming light south southwest after midnight.
Sunday
Sunny, with a high near 96. Heat index values as high as 106. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 75. South southeast wind 5 to 9 mph becoming light south after midnight.
Monday
Sunny, with a high near 95. Light south southwest wind becoming south southeast 6 to 11 mph in the morning.
Monday Night
Clear, with a low around 77. South southeast wind 6 to 10 mph.
Tuesday
Sunny, with a high near 95. Light south southwest wind becoming south southeast 6 to 11 mph in the morning.
Tuesday Night
Clear, with a low around 76. South southeast wind 7 to 11 mph.
Wednesday
Sunny, with a high near 95. South southwest wind 5 to 11 mph.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 96.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 76.
Friday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tivoli TX
 28.42°N 96.89°W
Last Update:
1:21 pm CDT Aug 22, 2026
Forecast Valid:
1pm CDT Aug 22, 2026-6pm CDT Aug 28, 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