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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

82°F

28°C

Humidity 70%
Wind Speed S 9 mph
Barometer 29.91 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 30 Jul 3:55 am CDT
Extended Forecast for

2 Miles SSW Cartwright OK

Heat Advisory July 30, 04:11am until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 30, 04:11am until July 30, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 81. South southeast wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 102. Heat index values as high as 108. Southwest wind around 10 mph.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79. South southwest wind 5 to 10 mph becoming north after midnight.

    Low: 79 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 94. North wind around 10 mph.

    High: 94 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72. North wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92. North wind 5 to 10 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 72. Northeast wind 5 to 10 mph becoming light east northeast after midnight.

    Low: 72 °F

    Clear

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 81. South southeast wind 5 to 10 mph.
Friday
Mostly sunny and hot, with a high near 102. Heat index values as high as 108. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 79. South southwest wind 5 to 10 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 94. North wind around 10 mph.
Saturday Night
Mostly clear, with a low around 72. North wind 5 to 10 mph.
Sunday
Sunny, with a high near 92. North wind 5 to 10 mph.
Sunday Night
Clear, with a low around 72. Northeast wind 5 to 10 mph becoming light east northeast after midnight.
Monday
Sunny, with a high near 94. East wind around 5 mph.
Monday Night
Clear, with a low around 75.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Cartwright OK
 33.82°N 96.58°W (Elev. 617 ft)
Last Update:
1:26 am CDT Jul 30, 2026
Forecast Valid:
4am CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation