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

Hearne, Hearne Municipal Airport (KLHB)

Lat: 30.87°NLon: 96.62°WElev: 285ft.

Fair

93°F

34°C

Humidity 41%
Wind Speed SE 6 mph
Barometer 29.95 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 21 Aug 8:35 pm CDT
Extended Forecast for

5 Miles SSW Calvert TX

Heat Advisory August 21, 08:54pm until August 22, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 21, 08:54pm until August 22, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 79 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 105. Heat index values as high as 108. South southwest wind around 5 mph.

    High: 105 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 80. South southeast wind around 5 mph.

    Low: 80 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 104. Heat index values as high as 111. South southwest wind around 5 mph.

    High: 104 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 79. South southeast wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Monday Night

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

    Low: 77 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 103. South southwest wind around 10 mph.

    High: 103 °F

    Hot

Detailed Forecast

Tonight
Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 79. South wind around 5 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny and hot, with a high near 105. Heat index values as high as 108. South southwest wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 80. South southeast wind around 5 mph.
Sunday
Sunny and hot, with a high near 104. Heat index values as high as 111. South southwest wind around 5 mph.
Sunday Night
Mostly clear, with a low around 79. South southeast wind around 5 mph.
Monday
Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Monday Night
Clear, with a low around 77. South wind around 10 mph.
Tuesday
Sunny and hot, with a high near 103. South southwest wind around 10 mph.
Tuesday Night
Clear, with a low around 78. South wind around 10 mph.
Wednesday
Sunny and hot, with a high near 103.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Mostly sunny and hot, with a high near 102.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Calvert TX
 30.92°N 96.69°W (Elev. 282 ft)
Last Update:
6:27 pm CDT Aug 21, 2026
Forecast Valid:
8pm CDT Aug 21, 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