Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

99°F

37°C

Humidity 29%
Wind Speed S 8 mph
Barometer 30.13 in
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Heat Index100°F (38°C)
Last update 16 Sep 5:50 pm CDT
Extended Forecast for

5 Miles ESE Willis OK

Heat Advisory September 17, 12:00pm until September 17, 07:00pm
Heat Advisory September 16, 06:31pm until September 16, 07:00pm
Click here for hazard details and duration
Heat Advisory
...
  •  
    Heat Advisory September 16, 06:31pm until September 16, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Tonight

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 97. Heat index values as high as 105. Southeast wind 3 to 5 mph.

    High: 97 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. South southeast wind around 6 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 97. Heat index values as high as 100. South wind 3 to 6 mph.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind 5 to 8 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 78.

    Low: 78 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 80. Southeast wind around 7 mph.
Thursday
Sunny and hot, with a high near 97. Heat index values as high as 105. Southeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 79. South southeast wind around 6 mph.
Friday
Sunny and hot, with a high near 97. Heat index values as high as 100. South wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 78. South southeast wind 5 to 8 mph.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Clear, with a low around 78.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 76.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ESE Willis OK
 33.84°N 96.75°W
1:27 pm CDT Sep 16, 2026
6pm CDT Sep 16, 2026-6pm CDT Sep 23, 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