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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

86°F

30°C

Humidity 41%
Wind Speed N 3 mph
Barometer 30.00 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Aug 9:55 pm CDT
Extended Forecast for

4 Miles NNW Pottsboro TX

  • Tonight

    Tonight: Mostly clear, with a low around 76. East northeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 97. Heat index values as high as 100. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 77. East southeast wind around 5 mph.

    Low: 77 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 98. Heat index values as high as 103. Southeast wind around 5 mph.

    High: 98 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 79. South southeast wind around 10 mph.

    Low: 79 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 98. South wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 79. South southeast wind around 10 mph.

    Low: 79 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 76. East northeast wind around 5 mph.
Friday
Sunny, with a high near 97. Heat index values as high as 100. Calm wind becoming east northeast around 5 mph in the afternoon.
Friday Night
Clear, with a low around 77. East southeast wind around 5 mph.
Saturday
Sunny, with a high near 98. Heat index values as high as 103. Southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 79. South southeast wind around 10 mph.
Monday
Sunny, with a high near 98. South wind 5 to 10 mph.
Monday Night
Clear, with a low around 79. South southeast wind around 10 mph.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Clear, with a low around 79.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 79.
Thursday
Sunny and hot, with a high near 99.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Pottsboro TX
 33.82°N 96.71°W (Elev. 640 ft)
Last Update:
6:06 pm CDT Aug 27, 2026
Forecast Valid:
10pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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