Severe Weather Threat and Extreme Temperatures Impacting Portions of the Southern U.S

Strong to severe thunderstorms are expected to develop from central Texas into the Ohio Valley and Great Lakes Wednesday. Areas who will see the greatest chances for damaging hail and winds will be from north Texas to the Ozarks. Parts of south Texas and Florida will experience dangerous to extreme heat over the next several days. Dangerous heat stress may continue into early next week. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fog/Mist

76°F

24°C

Humidity	91%
Wind Speed	S 15 mph
Barometer	29.80 in
Dewpoint	73°F (23°C)
Visibility	5.00 mi
Heat Index	76°F (24°C)
Last update	22 May 6:15 am CDT

More Information:

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

Extended Forecast for

3 Miles ENE Knollwood TX

Flood Watch May 22, 10:00am until May 24, 01:00am

Click here for hazard details and duration

Flood Watch

Today
High: 84 °F
Severe
Thunderstorms
and Patchy
Fog
Tonight
Low: 68 °F
Severe
Thunderstorms
Thursday
High: 84 °F
Slight Chance
T-storms then
Chance
T-storms
Thursday Night
Low: 73 °F
Chance
T-storms
Friday
High: 91 °F
Mostly Sunny
Friday Night
Low: 70 °F
Slight Chance
T-storms
Saturday
High: 90 °F
Mostly Sunny
then Chance
T-storms
Saturday Night
Low: 74 °F
Chance
T-storms
Sunday
High: 94 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms, mainly after 1pm. Some of the storms could be severe. Patchy fog before 9am. High near 84. South wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Tonight

Showers and thunderstorms likely, mainly before 10pm. Some of the storms could be severe. Mostly cloudy, with a low around 68. East wind around 5 mph becoming north in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Thursday

A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. South wind 5 to 10 mph, with gusts as high as 20 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. South wind around 10 mph, with gusts as high as 20 mph.

Friday

Mostly sunny, with a high near 91. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

Friday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 70. South wind around 5 mph.

Saturday

A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. South wind 5 to 10 mph, with gusts as high as 20 mph.

Saturday Night

A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 74. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

Sunday

Sunny, with a high near 94. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

Sunday Night

Mostly clear, with a low around 71.

Memorial Day

Sunny, with a high near 90.

Monday Night

Mostly clear, with a low around 64.

Tuesday

Sunny, with a high near 85.