Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

Port Lavaca - Calhoun County Airport (KPKV)

Lat: 28.65°NLon: 96.68°WElev: 27ft.

Fair

95°F

35°C

Humidity 46%
Wind Speed S 9 mph
Barometer 29.92 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 26 Aug 5:35 pm CDT
Extended Forecast for

6 Miles SE Port Lavaca TX

Heat Advisory August 26, 05:48pm until August 26, 07:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory August 26, 05:48pm until August 26, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Tonight

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Heat index values as high as 109. West southwest wind 5 to 11 mph becoming southeast in the afternoon.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 80. South wind 5 to 11 mph.

    Low: 80 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 92. Heat index values as high as 106. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79. Southeast wind 5 to 10 mph becoming light south southeast  after midnight.

    Low: 79 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Sunny, with a high near 92. Light and variable wind becoming southeast 6 to 11 mph in the afternoon.

    High: 92 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph becoming light south  after midnight.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 91. Light south wind becoming southeast 6 to 11 mph in the afternoon.

    High: 91 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 80. South wind 7 to 13 mph.
Thursday
Sunny, with a high near 94. Heat index values as high as 109. West southwest wind 5 to 11 mph becoming southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 80. South wind 5 to 11 mph.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 106. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 79. Southeast wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 92. Light and variable wind becoming southeast 6 to 11 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph becoming light south after midnight.
Sunday
Sunny, with a high near 91. Light south wind becoming southeast 6 to 11 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 79. Southeast wind 6 to 11 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 79.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SE Port Lavaca TX
 28.56°N 96.56°W
4:06 pm CDT Aug 26, 2026
5pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

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