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.

Fair

97°F

36°C

Humidity 32%
Wind Speed E 10 G 21 mph
Barometer 29.92 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 27 Aug 6:35 pm CDT
Extended Forecast for

Sachse TX

Heat Advisory August 27, 06:41pm until August 27, 08:00pm
Click here for hazard details and duration
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  •  
    Heat Advisory August 27, 06:41pm until August 27, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 76 °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 76. East wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 106. Southeast wind around 5 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 77. Southeast wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 99. South wind around 10 mph.

    High: 99 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 76. East northeast wind 10 to 15 mph becoming light and variable after midnight.
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 76. East wind around 5 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 106. Southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 77. Southeast wind around 5 mph.
Sunday
Sunny and hot, with a high near 100. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 77. South 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 77. South southeast wind around 10 mph.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Clear, with a low around 77.
Thursday
Sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
Sachse TX
 32.99°N 96.59°W (Elev. 548 ft)
6:06 pm CDT Aug 27, 2026
6pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database