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

Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Northern Plains and Upper Midwest

Dangerous heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms will produce damaging winds and heavy rainfall over portions of the northern/central Plains into the mid/upper-Mississippi Valleys today. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

90°F

32°C

Humidity 59%
Wind Speed S 8 mph
Barometer 29.97 in (1014.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 30 Jul 10:53 am CDT
Extended Forecast for

3 Miles ENE Prosper TX

Heat Advisory July 30, 11:11am until July 30, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 30, 11:11am until July 30, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Today

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 81. South southeast wind around 10 mph.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. Heat index values as high as 109. Southwest wind around 10 mph.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 81. South southwest wind 5 to 10 mph.

    Low: 81 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 97. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 97 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 93. North wind 5 to 10 mph.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 74. East northeast wind 5 to 10 mph.

    Low: 74 °F

    Clear

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 108. South wind around 10 mph.
Tonight
Mostly clear, with a low around 81. South southeast wind around 10 mph.
Friday
Sunny and hot, with a high near 102. Heat index values as high as 109. Southwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 81. South southwest wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 97. North wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 74. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 93. North wind 5 to 10 mph.
Sunday Night
Clear, with a low around 74. East northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 96. East wind around 5 mph.
Monday Night
Clear, with a low around 76.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Prosper TX
 33.26°N 96.73°W (Elev. 705 ft)
Last Update:
6:11 am CDT Jul 30, 2026
Forecast Valid:
11am CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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