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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

88°F

31°C

Humidity 55%
Wind Speed S 14 G 23 mph
Barometer 29.96 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 13 Aug 9:53 am CDT
Extended Forecast for

Prosper TX

Heat Advisory August 13, 10:38am until August 13, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 13, 10:38am until August 13, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Today

    High: 101 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 78. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 15 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 80. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 80 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. South wind around 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 80. South wind 5 to 10 mph.

    Low: 80 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 80. South wind 5 to 10 mph.

    Low: 80 °F

    Clear

Detailed Forecast

Today
Sunny and hot, with a high near 101. Heat index values as high as 105. South southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 78. South wind around 15 mph, with gusts as high as 25 mph.
Friday
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind around 15 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 80. South wind around 15 mph, with gusts as high as 25 mph.
Saturday
Sunny and hot, with a high near 100. South wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 80. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.
Sunday Night
Clear, with a low around 80. South wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 102. West southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Sunny and hot, with a high near 102.
Tuesday Night
Clear, with a low around 80.
Wednesday
Sunny and hot, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosper TX
 33.23°N 96.81°W (Elev. 646 ft)
Last Update:
6:12 am CDT Aug 13, 2026
Forecast Valid:
10am CDT Aug 13, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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