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.

Fair

83°F

28°C

Humidity	41%
Wind Speed	S 6 mph
Barometer	29.95 in
Dewpoint	57°F (14°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	26 Aug 12:15 am CDT

More Information:

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

Extended Forecast for

Denison 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
Partly Cloudy
Wednesday
High: 100 °F
Mostly Sunny
then Slight
Chance
T-storms
Wednesday Night
Low: 77 °F
Partly Cloudy
Thursday
High: 99 °F
Sunny then
Slight Chance
T-storms
Thursday Night
Low: 74 °F
Mostly Clear
Friday
High: 98 °F
Sunny
Friday Night
Low: 75 °F
Clear
Saturday
High: 99 °F
Hot

Detailed Forecast

Overnight

Partly cloudy, with a low around 82. South southwest wind 5 to 10 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph becoming north northwest in the afternoon.

Wednesday Night

Partly cloudy, with a low around 77. North northeast wind around 5 mph.

Thursday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 102. Northeast wind 5 to 10 mph.

Thursday Night

Mostly clear, with a low around 74. Northeast wind around 5 mph.

Friday

Sunny, with a high near 98. East northeast wind around 5 mph.

Friday Night

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

Saturday

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

Saturday Night

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

Sunday

Sunny and hot, with a high near 101.