Severe Thunderstorms in the Upper Midwest; Excessive Heat in the Central U.S.

Severe thunderstorms, capable of severe wind (locally exceeding hurricane force), very large hail, flash flooding, and a few tornadoes, are possible late this afternoon into tonight across portions of the of the Upper Midwest into the southern Great Lakes. Excessive heat covers much of the central third of the country and is expected to persist into the weekend over the south-central states. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

95°F

35°C

Humidity 50%
Wind Speed E 7 mph
Barometer 30.04 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 28 Jul 2:50 pm CDT
Extended Forecast for

2 Miles WNW Denison TX

Heat Advisory July 29, 12:00pm until July 29, 07:00pm
Click here for hazard details and duration
Heat Advisory
  • This
    Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 96. Heat index values as high as 106. East southeast wind around 5 mph.

    Slight Chance
    T-storms

    High: 96 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm  in the evening.

    Partly Cloudy

    Low: 76 °F

  • Thursday

    Thursday: Sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the morning.

    Sunny

    High: 97 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph.

    Mostly Clear

    Low: 76 °F

  • Friday

    Friday: Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.

    Sunny

    High: 98 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 77. South southeast wind around 5 mph.

    Mostly Clear

    Low: 77 °F

  • Saturday

    Saturday: Sunny and hot, with a high near 99. South southwest wind around 5 mph.

    Hot

    High: 99 °F

  • Saturday
    Night

    Saturday Night: Clear, with a low around 77. South wind 5 to 10 mph.

    Clear

    Low: 77 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph becoming southeast in the afternoon.

    Sunny then
    Slight Chance
    T-storms

    High: 100 °F

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96. Heat index values as high as 106. East southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph.
Friday
Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 77. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 99. South southwest wind around 5 mph.
Saturday Night
Clear, with a low around 77. South wind 5 to 10 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph becoming southeast in the afternoon.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 69.
Tuesday
Sunny, with a high near 92.
Click Map For Forecast
Point Forecast:
2 Miles WNW Denison TX
 33.78°N 96.6°W (Elev. 702 ft)
3:37 pm CDT Jul 28, 2021
3pm CDT Jul 28, 2021-6pm CDT Aug 3, 2021
 
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Additional Resources

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