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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

99°F

37°C

Humidity 39%
Wind Speed S 13 G 20 mph
Barometer 29.93 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index106°F (41°C)
Last update 8 Aug 3:50 pm CDT
Extended Forecast for

4 Miles NW Pottsboro TX

Heat Advisory August 8, 04:38pm until August 9, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 8, 04:38pm until August 9, 07:00pm

    NOW until 7:00pm Sat

    Heat Advisory

  • Tonight

    Low: 80 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 111. South wind around 10 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. South wind around 10 mph.

    Low: 79 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 97. Heat index values as high as 106. South wind 5 to 10 mph.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 94. South southeast wind around 5 mph.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 74. Southeast wind around 5 mph.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. East southeast wind around 5 mph becoming calm.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 80. South wind around 10 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 111. South wind around 10 mph.
Saturday Night
Mostly clear, with a low around 79. South wind around 10 mph.
Sunday
Sunny, with a high near 97. Heat index values as high as 106. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 77. South southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 94. South southeast wind around 5 mph.
Monday Night
Partly cloudy, with a low around 74. Southeast wind around 5 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. East southeast wind around 5 mph becoming calm.
Tuesday Night
Partly cloudy, with a low around 74. East southeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny, with a high near 93.
Thursday Night
Partly cloudy, with a low around 78.
Friday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Pottsboro TX
 33.82°N 96.74°W (Elev. 728 ft)
Last Update:
12:24 pm CDT Aug 8, 2025
Forecast Valid:
4pm CDT Aug 8, 2025-6pm CDT Aug 15, 2025
 
Forecast Discussion
 
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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