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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Rockwall Municipal Airport (KF46)

Lat: 32.93°NLon: 96.43°WElev: 564ft.

Fair

96°F

36°C

Humidity 44%
Wind Speed S 8 mph
Barometer 29.85 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 29 Jul 6:35 pm CDT
Extended Forecast for

4 Miles ENE McLendon-Chisholm TX

Heat Advisory July 29, 06:41pm until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 29, 06:41pm until July 30, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 107. Southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 103. Heat index values as high as 109. Southwest wind around 10 mph.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 78. South southwest wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 98. West southwest wind around 10 mph becoming north in the afternoon.

    High: 98 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. North northeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95. North wind 5 to 10 mph.

    High: 95 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. South wind around 5 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 107. Southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 103. Heat index values as high as 109. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 78. South southwest wind 5 to 10 mph.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 98. West southwest wind around 10 mph becoming north in the afternoon.
Saturday Night
Mostly clear, with a low around 73. North northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 95. North wind 5 to 10 mph.
Sunday Night
Clear, with a low around 73. Northeast wind 5 to 10 mph becoming light east in the evening.
Monday
Sunny, with a high near 97.
Monday Night
Clear, with a low around 75.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE McLendon-Chisholm TX
 32.85°N 96.29°W (Elev. 551 ft)
Last Update:
6:12 pm CDT Jul 29, 2026
Forecast Valid:
6pm CDT Jul 29, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation