Severe Weather and Excessive Rain in the Ohio and Tennessee Valley

Severe storms are expected to continue this evening and overnight across the eastern Ozark Plateau into the Ohio and Tennessee Valley. Tornadoes, some strong to intense, and large to very large hail will remain the primary concerns this evening before transitioning to a widespread severe wind threat overnight. The associated heavy rain will create numerous areas of flash flooding. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Partly Cloudy

88°F

31°C

Humidity	40%
Wind Speed	E 7 mph
Barometer	29.94 in
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	27 May 7:35 pm CDT

More Information:

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

Extended Forecast for

Sherman TX

Tonight
Low: 68 °F
Mostly Clear
then Chance
T-storms
Tuesday
High: 83 °F
Showers
Likely
Tuesday Night
Low: 67 °F
Chance
T-storms then
Showers
Likely
Wednesday
High: 80 °F
Showers
Likely
Wednesday Night
Low: 66 °F
Chance
T-storms
Thursday
High: 80 °F
Chance
T-storms
Thursday Night
Low: 67 °F
Chance
T-storms then
Heavy Rain
Friday
High: 80 °F
T-storms
Likely
Friday Night
Low: 68 °F
Chance
T-storms

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 68. East wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday

A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. East wind 5 to 10 mph. Chance of precipitation is 60%.

Wednesday Night

A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. East southeast wind 5 to 10 mph.

Thursday

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday Night

Showers and thunderstorms likely, mainly after 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.

Friday

Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 80. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.

Friday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southeast wind around 5 mph.

Saturday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 83.

Saturday Night

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

Sunday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

Sunday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.