Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 20, 08:00 PM CDT

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

88°F

31°C

Humidity	45%
Wind Speed	S 14 mph
Barometer	29.92 in
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	20 Aug 2:15 am CDT

More Information:

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

Extended Forecast for

2 Miles S Sherman TX

Extreme Heat Warning August 20, 02:30am until August 20, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 20, 02:30am until August 20, 08:00pm
NOW until 8:00pm Thu
Extreme Heat Warning
Overnight
Low: 81 °F
Mostly Clear
Thursday
High: 105 °F
Sunny then
Slight Chance
T-storms
Thursday Night
Low: 80 °F
Slight Chance
T-storms then
Partly Cloudy
Friday
High: 105 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 80 °F
Slight Chance
T-storms then
Partly Cloudy
Saturday
High: 104 °F
Hot
Saturday Night
Low: 78 °F
Partly Cloudy
Sunday
High: 104 °F
Hot

Detailed Forecast

Overnight

Mostly clear, with a low around 81. South southwest wind 5 to 10 mph.

Thursday

A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 105. Heat index values as high as 109. South southwest wind 5 to 10 mph.

Thursday Night

A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 80. South southeast wind around 5 mph becoming northeast in the evening.

Friday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 105. Heat index values as high as 111. South wind around 5 mph becoming west southwest in the afternoon.

Friday Night

A 10 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 80. South southwest wind around 5 mph.

Saturday

Sunny and hot, with a high near 104. South southwest wind around 5 mph.

Saturday Night

Partly cloudy, with a low around 78. South wind around 5 mph.

Sunday

Sunny and hot, with a high near 104. South wind around 5 mph.

Sunday Night

Mostly clear, with a low around 80. South southeast wind 5 to 10 mph.

Monday

Sunny and hot, with a high near 104.