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

81°F

27°C

Humidity 47%
Wind Speed E 6 mph
Barometer 30.04 in
Dewpoint 59°F (15°C)
Visibility 9.00 mi
Heat Index81°F (27°C)
Last update 28 Aug 11:55 pm CDT
Extended Forecast for

3 Miles SSE Willis OK

  • Overnight

    Overnight: Clear, with a low around 75. East wind around 5 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 102. East southeast wind around 5 mph.

    High: 99 °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 99. Heat index values as high as 104. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Clear

  • Monday

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

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 78. South southeast wind 5 to 10 mph.

    Low: 78 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. South southeast wind around 5 mph.

    High: 98 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 75. East wind around 5 mph, with gusts as high as 20 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 102. East 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 99. Heat index values as high as 104. South wind 5 to 10 mph.
Sunday Night
Clear, with a low around 78. South wind around 5 mph.
Monday
Sunny, with a high near 98. South wind around 5 mph.
Monday Night
Clear, with a low around 78. South southeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 98. South southeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 78.
Friday
Sunny and hot, with a high near 99.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Willis OK
 33.84°N 96.82°W (Elev. 656 ft)
Last Update:
6:07 pm CDT Aug 28, 2026
Forecast Valid:
12am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

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