Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

100°F

38°C

Humidity 31%
Wind Speed SW 9 mph
Barometer 29.96 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 19 Aug 11:50 am CDT
Extended Forecast for

Howe TX

Extreme Heat Warning August 19, 01:24pm until August 20, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 01:24pm until August 20, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • This Afternoon

    High: 102 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 80. South wind around 10 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 4pm.  Sunny and hot, with a high near 103. Southwest wind 5 to 10 mph.

    High: 103 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 78. Southeast wind around 5 mph.

    Low: 78 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 103. Southeast wind around 5 mph becoming west southwest in the afternoon.

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 103. South wind around 5 mph.

    High: 103 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. South wind around 5 mph.

    Low: 79 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 102. South southwest wind around 10 mph.
Tonight
Mostly clear, with a low around 80. South wind around 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 103. Southwest wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 78. Southeast wind around 5 mph.
Friday
Mostly sunny and hot, with a high near 103. Southeast wind around 5 mph becoming west southwest in the afternoon.
Friday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 103. South wind around 5 mph.
Saturday Night
Mostly clear, with a low around 79. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 80.
Monday
Sunny and hot, with a high near 103.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Sunny and hot, with a high near 102.
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ABOUT THIS FORECAST

 
Point Forecast:
Howe TX
 33.5°N 96.63°W (Elev. 814 ft)
11:31 am CDT Aug 19, 2026
1pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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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