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

Thunderstorms and Heavy Rainfall from the Plains to the Mid-Atlantic

Severe thunderstorms producing damaging winds are most likely over parts of the Dakotas into Minnesota from this afternoon into the overnight, with other isolated storms producing hail or wind over the northern High Plains. In the Northern Plains into the Upper Great Lakes and Mid-Atlantic, heavy to excessive rain may bring flash and urban flooding through Wednesday. Read More >

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Partly Cloudy

94°F

34°C

Humidity 43%
Wind Speed S 7 mph
Barometer 30.04 in (1016.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 7 Jul 1:53 pm CDT
Extended Forecast for

Allen TX

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 102. West southwest wind around 5 mph.

    High: 97 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph.

    Low: 76 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 99 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 81. South wind around 15 mph, with gusts as high as 20 mph.

    Low: 81 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 98. South southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 81 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. South southwest wind around 10 mph.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 102. West southwest wind around 5 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 76. Southeast wind around 5 mph.
Wednesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 78. South southeast wind around 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 100. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 81. South wind around 15 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 98. South southwest wind around 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. South southwest wind around 10 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 80.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Allen TX
 33.1°N 96.67°W (Elev. 656 ft)
Last Update:
1:27 pm CDT Jul 7, 2026
Forecast Valid:
2pm CDT Jul 7, 2026-6pm CDT Jul 13, 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