Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

93°F

34°C

Humidity 40%
Wind Speed SE 6 mph
Barometer 29.93 in (1012.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 20 Aug 8:53 pm CDT
Extended Forecast for

Mc Kinney TX

Extreme Heat Warning August 20, 09:44pm until August 21, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 20, 09:44pm until August 21, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 82 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 4pm.  Sunny and hot, with a high near 106. Heat index values as high as 110. South wind around 5 mph.

    High: 106 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers after 4am.  Increasing clouds, with a low around 81. South southeast wind around 5 mph.  Chance of precipitation is 20%.

    Low: 81 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 10 percent chance of showers before 7am.  Sunny and hot, with a high near 106. Heat index values as high as 109. South wind around 5 mph.

    High: 106 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 80. South wind around 5 mph.

    Low: 80 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 105. South southwest wind 5 to 10 mph.

    High: 105 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 82. Southeast wind 5 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 105. South southwest wind around 10 mph.

    High: 105 °F

    Hot

Detailed Forecast

Tonight
A 10 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 82. South wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 106. Heat index values as high as 110. South wind around 5 mph.
Friday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers after 4am. Increasing clouds, with a low around 81. South southeast wind around 5 mph. Chance of precipitation is 20%.
Saturday
A 10 percent chance of showers before 7am. Sunny and hot, with a high near 106. Heat index values as high as 109. South wind around 5 mph.
Saturday Night
Mostly clear, with a low around 80. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 105. South southwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 82. Southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 105. South southwest wind around 10 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 81. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 105.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 82.
Wednesday
Sunny and hot, with a high near 102.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 102.
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ABOUT THIS FORECAST

 
Point Forecast:
Mc Kinney TX
 33.21°N 96.65°W (Elev. 600 ft)
6:12 pm CDT Aug 20, 2026
9pm CDT Aug 20, 2026-6pm CDT Aug 27, 2026
 
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