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

Heat Advisory in effect from August 25, 09:00 PM CDT until August 26, 09:00 PM CDT

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

A Few Clouds

88°F

31°C

Humidity	32%
Wind Speed	S 10 mph
Barometer	29.93 in
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Heat Index	86°F (30°C)
Last update	25 Aug 10:15 pm CDT

More Information:

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

Extended Forecast for

4 Miles ESE Collinsville 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
Tonight
Low: 81 °F
Mostly Clear
Wednesday
High: 99 °F
Slight Chance
Showers then
Slight Chance
T-storms
Wednesday Night
Low: 75 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday
High: 97 °F
Mostly Sunny
Thursday Night
Low: 73 °F
Mostly Clear
Friday
High: 97 °F
Sunny
Friday Night
Low: 73 °F
Clear
Saturday
High: 98 °F
Sunny

Detailed Forecast

Tonight

Mostly clear, with a low around 81. South wind around 10 mph, with gusts as high as 20 mph.

Wednesday

A slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 103. South southwest wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 20%.

Wednesday Night

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

Thursday

Mostly sunny, with a high near 97. North northeast wind 5 to 10 mph.

Thursday Night

Mostly clear, with a low around 73. Northeast wind 5 to 10 mph.

Friday

Sunny, with a high near 97. East northeast wind around 5 mph.

Friday Night

Clear, with a low around 73. Southeast wind around 5 mph.

Saturday

Sunny, with a high near 98. South southeast wind around 5 mph.

Saturday Night

Clear, with a low around 75. Southeast wind around 5 mph.