Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

Record setting heat is expected over the next several days from the Intermountain West through the northern Plains. Furthermore, fire weather concerns increase with dry and breezy conditions. Meanwhile, heavy rainfall and severe thunderstorm threats for the Ohio/Tennessee Valleys, central Appalachians and Southeast today. The threat shifts to central Gulf Coast and across central Texas this week. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

88°F

31°C

Humidity	59%
Wind Speed	SW 7 mph
Barometer	30.13 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	95°F (35°C)
Last update	12 Jul 11:50 am CDT

More Information:

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

Extended Forecast for

5 Miles WSW Grayson County Airport TX

This Afternoon
High: 92 °F
Showers
Likely
Tonight
Low: 73 °F
Showers
Likely then
Chance
T-storms
Monday
High: 90 °F
Chance
Showers then
Chance
T-storms
Monday Night
Low: 72 °F
Slight Chance
T-storms then
Mostly Clear
Tuesday
High: 89 °F
Chance
T-storms
Tuesday Night
Low: 71 °F
Chance
T-storms then
Mostly Clear
Wednesday
High: 90 °F
Slight Chance
T-storms
Wednesday Night
Low: 72 °F
Partly Cloudy
Thursday
High: 92 °F
Mostly Sunny

Detailed Forecast

This Afternoon

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 92. Heat index values as high as 99. South southwest wind around 5 mph becoming east. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms, mainly between 7pm and 4am. Mostly cloudy, with a low around 73. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

A 40 percent chance of showers and thunderstorms, mainly between 10am and 4pm. Partly sunny, with a high near 90. Heat index values as high as 97. Calm wind becoming east southeast around 5 mph in the afternoon.

Monday Night

A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. East wind around 5 mph becoming calm in the evening.

Tuesday

A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 89. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 30%.

Tuesday Night

A chance of thunderstorms before 7pm. Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

Wednesday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.

Wednesday Night

Partly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening.

Thursday

Mostly sunny, with a high near 92. South southwest wind 5 to 10 mph.

Thursday Night

Partly cloudy, with a low around 75.

Friday

Mostly sunny, with a high near 94.

Friday Night

Mostly clear, with a low around 76.