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

Palacios Municipal Airport (KPSX)

Lat: 28.72°NLon: 96.25°WElev: 13ft.

90°F

32°C

Humidity 66%
Wind Speed S 15 mph
Barometer 29.96 in (1014.4 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 22 Aug 5:53 pm CDT
Extended Forecast for

Port O Connor TX

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

    NOW until 7:00pm Sat

    Heat Advisory

  • Tonight

    Low: 82 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88. Heat index values as high as 102. West southwest wind 6 to 10 mph becoming south in the afternoon.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 82. South wind 8 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88. Heat index values as high as 102. South southwest wind around 10 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 83. South southeast wind around 11 mph.

    Low: 83 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. South southwest wind 8 to 11 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 83. South southeast wind around 14 mph, with gusts as high as 20 mph.

    Low: 83 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. South southwest wind around 11 mph.

    High: 87 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 82. South wind 9 to 13 mph.
Sunday
Sunny, with a high near 88. Heat index values as high as 102. West southwest wind 6 to 10 mph becoming south in the afternoon.
Sunday Night
Mostly clear, with a low around 82. South wind 8 to 10 mph.
Monday
Sunny, with a high near 88. Heat index values as high as 102. South southwest wind around 10 mph.
Monday Night
Mostly clear, with a low around 83. South southeast wind around 11 mph.
Tuesday
Sunny, with a high near 88. South southwest wind 8 to 11 mph.
Tuesday Night
Clear, with a low around 83. South southeast wind around 14 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 87. South southwest wind around 11 mph.
Wednesday Night
Clear, with a low around 83. South wind around 14 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 83.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 83.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Port O Connor TX
 28.44°N 96.4°W
Last Update:
4:46 pm CDT Aug 22, 2026
Forecast Valid:
6pm CDT Aug 22, 2026-6pm CDT Aug 29, 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