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

Severe Thunderstorms and Flash Flooding in the Central U.S.; A Dangerous Heatwave Coming to the West

Multiple rounds of widespread heavy rain, localized flash flooding, and severe thunderstorms are possible from the central Plains into the Great Lakes today, Friday and Saturday. A dangerous heatwave with record breaking and triple digit temperatures is expected this weekend into next week over the Northwest U.S. Excessive Heat Watches and Warnings have been issued. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Clear

91°F

33°C

Humidity 46%
Wind Speed S 17 G 22 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 24 Jun 12:50 pm CDT
Extended Forecast for

Denison TX

  • This
    Afternoon

    This Afternoon: Sunny, with a high near 97. Heat index values as high as 105. South wind around 15 mph, with gusts as high as 20 mph.

    Sunny

    High: 97 °F

  • Tonight

    Tonight: Mostly clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 77 °F

  • Friday

    Friday: Sunny, with a high near 96. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Sunny

    High: 96 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 75. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 75 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Sunny

    High: 94 °F

  • Saturday
    Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Clear
    then Chance
    T-storms

    Low: 74 °F

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. South southwest wind 5 to 10 mph.

    Chance
    T-storms

    High: 89 °F

  • Sunday
    Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southeast wind around 5 mph.

    Chance
    T-storms

    Low: 71 °F

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.

    Chance
    T-storms then
    Showers
    Likely

    High: 87 °F

Detailed Forecast

This Afternoon
Sunny, with a high near 97. Heat index values as high as 105. South wind around 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 77. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 96. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 75. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. South southwest wind 5 to 10 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southeast wind around 5 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Denison TX
 33.75°N 96.55°W (Elev. 758 ft)
Last Update:
11:28 am CDT Jun 24, 2021
Forecast Valid:
12pm CDT Jun 24, 2021-6pm CDT Jun 30, 2021
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation