National Weather Service

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

99°F

37°C

Humidity	42%
Wind Speed	SE 13 G 18 mph
Barometer	29.99 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	109°F (43°C)
Last update	29 Jun 5:50 pm CDT

More Information:

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

Extended Forecast for

4 Miles E Knollwood TX

Heat Advisory June 29, 07:00pm until June 30, 07:00pm

Excessive Heat Warning June 29, 05:56pm until June 29, 07:00pm

Click here for hazard details and duration

Heat Advisory

...

Excessive Heat Warning June 29, 05:56pm until June 29, 07:00pm
NOW until 7:00pm Sat
Excessive Heat Warning
Tonight
Low: 80 °F
Mostly Clear
Sunday
High: 97 °F
Slight Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 78 °F
Partly Cloudy
Monday
High: 99 °F
Hot
Monday Night
Low: 79 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 80 °F
Mostly Clear
Wednesday
High: 100 °F
Hot

Detailed Forecast

Tonight

Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.

Sunday

A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 107. South southwest wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 78. East wind around 5 mph becoming calm in the evening.

Monday

Sunny and hot, with a high near 99. Heat index values as high as 108. Calm wind becoming south southeast around 5 mph in the morning.

Monday Night

Mostly clear, with a low around 79. South southeast wind 5 to 10 mph.

Tuesday

Sunny and hot, with a high near 101. South wind 5 to 10 mph.

Tuesday Night

Mostly clear, with a low around 80. South southeast wind around 10 mph.

Wednesday

Sunny and hot, with a high near 100. South wind 5 to 10 mph, with gusts as high as 20 mph.