Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Rockwall Municipal Airport (KF46)

Lat: 32.93°NLon: 96.43°WElev: 564ft.

Partly Cloudy

98°F

37°C

Humidity 38%
Wind Speed E 10 mph
Barometer 29.97 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 27 Aug 3:15 pm CDT
Extended Forecast for

2 Miles SSE Lavon TX

Heat Advisory August 27, 03:20pm until August 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 27, 03:20pm until August 27, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Heat index values as high as 105. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. East wind around 5 mph.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. South southeast wind around 5 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. East southeast wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. South wind around 10 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 76. Southeast wind 5 to 10 mph.

    Low: 76 °F

    Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 99. Heat index values as high as 106. Northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 100. Heat index values as high as 105. Calm wind becoming east northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 75. East wind around 5 mph.
Saturday
Sunny and hot, with a high near 100. South southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 76. East southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 100. South wind around 10 mph.
Sunday Night
Clear, with a low around 76. Southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 99. South wind around 10 mph.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Lavon TX
 32.99°N 96.43°W (Elev. 512 ft)
1:26 pm CDT Aug 27, 2026
3pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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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