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

Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

100°F

38°C

Humidity 31%
Wind Speed Calm
Barometer 29.87 in (1010.4 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 26 Aug 5:53 pm CDT
Extended Forecast for

2 Miles WSW Allen TX

Heat Advisory August 26, 06:26pm until August 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 26, 06:26pm until August 27, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. Heat index values as high as 109. Northeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 77. East northeast wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 98. Heat index values as high as 106. East wind 5 to 10 mph.

    High: 98 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 79. South southeast wind around 10 mph.

    Low: 79 °F

    Clear

  • Sunday

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

    High: 100 °F

    Hot

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 4am. Partly cloudy, with a low around 79. North wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny and hot, with a high near 100. Heat index values as high as 109. Northeast wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 77. East northeast wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 98. Heat index values as high as 106. East wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 78. Southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.
Saturday Night
Clear, with a low around 79. South southeast wind around 10 mph.
Sunday
Sunny and hot, with a high near 100. South wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 79. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 99.
Monday Night
Mostly clear, with a low around 79.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 80.
Wednesday
Sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Allen TX
 33.1°N 96.7°W (Elev. 640 ft)
Last Update:
6:06 pm CDT Aug 26, 2026
Forecast Valid:
6pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
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