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

Heat Advisory until August 27, 08:00 PM CDT

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

93°F

34°C

Humidity	45%
Wind Speed	NE 6 mph
Barometer	29.92 in
Dewpoint	69°F (21°C)
Visibility	8.00 mi
Heat Index	98°F (37°C)
Last update	26 Aug 7:15 pm CDT

More Information:

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

Extended Forecast for

Collinsville TX

Heat Advisory August 26, 07:26pm until August 27, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 26, 07:26pm until August 27, 08:00pm
NOW until 8:00pm Thu
Heat Advisory
Tonight
Low: 75 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday
High: 99 °F
Sunny then
Slight Chance
Showers
Thursday Night
Low: 74 °F
Slight Chance
Showers then
Partly Cloudy
Friday
High: 97 °F
Sunny
Friday Night
Low: 75 °F
Mostly Clear
Saturday
High: 99 °F
Hot
Saturday Night
Low: 77 °F
Clear
Sunday
High: 99 °F
Hot

Detailed Forecast

Tonight

A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 75. North wind 5 to 10 mph. Chance of precipitation is 20%.

Thursday

A 20 percent chance of showers after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Northeast wind 5 to 10 mph.

Thursday Night

A 10 percent chance of showers before 7pm. Partly cloudy, with a low around 74. Northeast wind around 5 mph becoming calm in the evening.

Friday

Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming east southeast around 5 mph in the afternoon.

Friday Night

Mostly clear, with a low around 75. Southeast wind around 5 mph.

Saturday

Sunny and hot, with a high near 99. South wind around 5 mph.

Saturday Night

Clear, with a low around 77. South southeast wind around 5 mph.