Extreme Heat Across the Southern U.S.; Flash Flooding Threats in the Mid-Atlantic, Northeast, and Four Corners Region

Dangerous and extreme heat will remain across portions of the southern U.S. this week. Heavy rainfall may bring significant flash flooding across portions of the Mid-Atlantic and Northeast through the night, and additional flash flooding concerns across New England on Wednesday. Monsoonal thunderstorms will bring a flash flood risk to the Four Corners region, especially in burn scar areas Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

87°F

31°C

Humidity 56%
Wind Speed S 10 mph
Barometer 29.87 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 28 Jul 11:35 pm CDT
Extended Forecast for

3 Miles SW Cartwright OK

Heat Advisory July 28, 11:43pm until July 29, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 28, 11:43pm until July 29, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Tonight

    Low: 80 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. Heat index values as high as 107. South wind around 5 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. South wind around 5 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. Heat index values as high as 105. South wind around 5 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 80. South southeast wind 5 to 10 mph.

    Low: 80 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 101. Southwest wind around 10 mph.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 80. South southwest wind 5 to 10 mph becoming north after midnight.

    Low: 80 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 96. North wind around 10 mph.

    High: 96 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 80. South southwest wind around 5 mph.
Wednesday
Mostly sunny and hot, with a high near 100. Heat index values as high as 107. South wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 80. South wind around 5 mph.
Thursday
Mostly sunny and hot, with a high near 100. Heat index values as high as 105. South wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 80. South southeast wind 5 to 10 mph.
Friday
Mostly sunny and hot, with a high near 101. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 80. South southwest wind 5 to 10 mph becoming north after midnight.
Saturday
Sunny, with a high near 96. North wind around 10 mph.
Saturday Night
Mostly clear, with a low around 72. North northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 93.
Sunday Night
Clear, with a low around 73.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 97.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Cartwright OK
 33.82°N 96.6°W (Elev. 617 ft)
6:11 pm CDT Jul 28, 2026
11pm CDT Jul 28, 2026-6pm CDT Aug 4, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database