Severe Thunderstorms in the Ohio and Tennessee Valleys; Flash Flooding Possible in the Southwest

Scattered damaging winds, isolated severe hail, and a brief tornado or two are possible from the Upper Ohio to Tennessee Valleys during the late afternoon and evening. Across the Southwest, monsoonal moisture will continue to bring heavy rain and a threat for isolated to scattered flash flooding through Saturday. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Light Rain

79°F

26°C

Humidity 80%
Wind Speed N 8 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 9.00 mi
Heat Index82°F (28°C)
Last update 5 Sep 7:15 pm CDT
Extended Forecast for

6 Miles ESE Collinsville TX

Severe T-storm Warning until September 5, 08:00pm
Click here for hazard details and duration
...
  •  
    Severe T-storm Warning until September 5, 08:00pm

    NOW until 8:00pm Fri

    Severe T-storm Warning

  • Tonight

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm.  Cloudy, then gradually becoming mostly sunny, with a high near 79. North northeast wind 5 to 10 mph.  Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82. East wind around 5 mph.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. East southeast wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84. Southeast wind 5 to 10 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. East southeast wind around 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 86. South southeast wind around 5 mph.

    High: 86 °F

    Sunny

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 63. North northeast wind around 10 mph. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 79. North northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 65. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 82. East wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 64. East southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 84. Southeast wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 63. East southeast wind around 5 mph.
Tuesday
Sunny, with a high near 86. South southeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 64. Southeast wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Clear, with a low around 66.
Thursday
Sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Collinsville TX
 33.53°N 96.82°W (Elev. 659 ft)
5:24 pm CDT Sep 5, 2025
7pm CDT Sep 5, 2025-6pm CDT Sep 12, 2025
 
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Additional Resources

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