Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Severe thunderstorms are expected across parts of the central and southern High Plains, central Great Lakes, and Ozarks Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

82°F

28°C

Humidity	60%
Wind Speed	SE 6 mph
Barometer	29.95 in (1013.4 mb)
Dewpoint	67°F (19°C)
Visibility	10.00 mi
Heat Index	84°F (29°C)
Last update	26 Aug 12:53 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Allen TX

Heat Advisory until August 26, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until August 26, 09:00pm
NOW until 9:00pm Wed
Heat Advisory
Overnight
Low: 82 °F
Mostly Clear
Wednesday
High: 102 °F
Mostly Sunny
then Slight
Chance
T-storms
Wednesday Night
Low: 78 °F
Slight Chance
T-storms
Thursday
High: 99 °F
Slight Chance
T-storms then
Partly Sunny
Thursday Night
Low: 76 °F
Partly Cloudy
Friday
High: 98 °F
Sunny
Friday Night
Low: 77 °F
Mostly Clear
Saturday
High: 99 °F
Hot

Detailed Forecast

Overnight

Mostly clear, with a low around 82. South southwest wind around 10 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 102. South southwest wind around 10 mph becoming northwest in the afternoon.

Wednesday Night

A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 78. Northwest wind 5 to 10 mph becoming north northeast after midnight. Chance of precipitation is 20%.

Thursday

A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. North wind 5 to 10 mph.

Thursday Night

Partly cloudy, with a low around 76. East northeast wind 5 to 10 mph.

Friday

Sunny, with a high near 98. East wind 5 to 10 mph.

Friday Night

Mostly clear, with a low around 77. East wind 5 to 10 mph.

Saturday

Sunny and hot, with a high near 99. South southeast wind 5 to 10 mph.

Saturday Night

Clear, with a low around 78. East southeast wind around 10 mph.

Sunday

Sunny and hot, with a high near 101.