Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

86°F

30°C

Humidity	75%
Wind Speed	E 8 mph
Barometer	29.99 in
Dewpoint	77°F (25°C)
Visibility	10.00 mi
Heat Index	97°F (36°C)
Last update	3 Aug 2:50 pm CDT

More Information:

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

Extended Forecast for

Collinsville TX

This Afternoon
High: 90 °F
Chance
Showers
Tonight
Low: 69 °F
Chance
Showers then
Chance
T-storms
Monday
High: 87 °F
Showers
Likely then
Slight Chance
T-storms
Monday Night
Low: 69 °F
Mostly Clear
Tuesday
High: 92 °F
Sunny
Tuesday Night
Low: 72 °F
Clear
Wednesday
High: 96 °F
Sunny
Wednesday Night
Low: 74 °F
Mostly Clear
Thursday
High: 97 °F
Sunny

Detailed Forecast

This Afternoon

A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 90. Heat index values as high as 97. Southeast wind around 5 mph. Chance of precipitation is 40%.

Tonight

A 50 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 69. East wind around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Showers and thunderstorms likely, mainly before 10am. Partly sunny, with a high near 87. East northeast wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

Mostly clear, with a low around 69. East wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 92. Calm wind becoming southeast around 5 mph.

Tuesday Night

Clear, with a low around 72. Southeast wind around 5 mph becoming calm in the evening.

Wednesday

Sunny, with a high near 96. Calm wind becoming south around 5 mph in the morning.

Wednesday Night

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

Thursday

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