Thunderstorms and Heavy Rainfall in the Mid-Atlantic and Southern New England; Fire Weather Concerns in the West

Heavy rain and isolated severe thunderstorms may continue to bring flash and urban flooding to the northern Mid-Atlantic and southern New England through tonight. Isolated dry thunderstorms will continue to bring a fire weather threat to the northwestern Great Basin through Friday. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

A Few Clouds

74°F

23°C

Humidity	81%
Wind Speed	Calm
Barometer	30.12 in
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	1 Aug 2:55 am CDT

More Information:

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

Extended Forecast for

Denison TX

Overnight
Low: 74 °F
Slight Chance
T-storms
Friday
High: 89 °F
Chance
T-storms
Friday Night
Low: 72 °F
Chance
T-storms
Saturday
High: 86 °F
Chance
Showers
Saturday Night
Low: 70 °F
Mostly Clear
Sunday
High: 90 °F
Mostly Sunny
Sunday Night
Low: 69 °F
Chance
T-storms
Monday
High: 88 °F
Chance
T-storms
Monday Night
Low: 69 °F
Mostly Clear

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 74. Northeast wind around 5 mph.

Friday

A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. Heat index values as high as 98. East northeast wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 5 mph becoming calm in the evening.

Saturday

A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 86. East wind around 5 mph. Chance of precipitation is 30%.

Saturday Night

Mostly clear, with a low around 70. East northeast wind around 5 mph becoming calm in the evening.

Sunday

Mostly sunny, with a high near 90. Southeast wind around 5 mph.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 69. East wind around 5 mph.

Monday

A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88. East wind around 5 mph.

Monday Night

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

Tuesday

Sunny, with a high near 93.