Severe Thunderstorms in the Upper Midwest; Excessive Heat in the Central U.S.

Severe thunderstorms, capable of severe wind (locally exceeding hurricane force), very large hail, flash flooding, and a few tornadoes, are possible late this afternoon into tonight across portions of the of the Upper Midwest into the southern Great Lakes. Excessive heat covers much of the central third of the country and is expected to persist into the weekend over the south-central states. Read More >

Hazardous Weather Conditions

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Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

95°F

35°C

Humidity	50%
Wind Speed	E 7 mph
Barometer	30.04 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	105°F (41°C)
Last update	28 Jul 2:50 pm CDT

More Information:

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

Extended Forecast for

2 Miles WNW Denison TX

Heat Advisory July 29, 12:00pm until July 29, 07:00pm

Click here for hazard details and duration

Heat Advisory

This
Afternoon

Slight Chance
T-storms
High: 96 °F
Tonight

Partly Cloudy
Low: 76 °F
Thursday

Sunny
High: 97 °F
Thursday
Night

Mostly Clear
Low: 76 °F
Friday

Sunny
High: 98 °F
Friday
Night

Mostly Clear
Low: 77 °F
Saturday

Hot
High: 99 °F
Saturday
Night

Clear
Low: 77 °F
Sunday

Sunny then
Slight Chance
T-storms
High: 100 °F

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96. Heat index values as high as 106. East southeast wind around 5 mph.

Tonight

Partly cloudy, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.

Thursday

Sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming east southeast around 5 mph in the morning.

Thursday Night

Mostly clear, with a low around 76. Southeast wind around 5 mph.

Friday

Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.

Friday Night

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

Saturday

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

Saturday Night

Clear, with a low around 77. South wind 5 to 10 mph.

Sunday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph becoming southeast in the afternoon.

Sunday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

Monday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.

Monday Night

A 20 percent chance of showers. Partly cloudy, with a low around 69.

Tuesday

Sunny, with a high near 92.