Post-Tropical Ophelia; Southern Severe; Unsettled Northwest

Ophelia continues to impact parts of the Mid-Atlantic and New England with rain and dangerous coastal conditions. Scattered severe storms in the South Plains and Lower Mississippi Valley may produce damaging winds, large to very large hail, and heavy rain. Cool and wet conditions are expected in the Northwest and into northern California. Locally heavy rain on burn scars could cause debris flows. Read More >

Hazardous Weather Conditions

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Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

99°F

37°C

Humidity	42%
Wind Speed	E 7 mph
Barometer	29.82 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	109°F (43°C)
Last update	24 Sep 2:50 pm CDT

More Information:

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

Extended Forecast for

Sherman TXSimilar City Names

Heat Advisory until September 24, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until September 24, 07:00pm

NOW until
7:00pm Sun

Heat Advisory
This
Afternoon

Severe
Thunderstorms
High: 95 °F
Tonight

Severe
Thunderstorms
Low: 70 °F
Monday

Severe
Thunderstorms
High: 88 °F
Monday
Night

Mostly Clear
Low: 64 °F
Tuesday

Sunny
High: 89 °F
Tuesday
Night

Mostly Clear
Low: 64 °F
Wednesday

Sunny
High: 89 °F
Wednesday
Night

Clear
Low: 65 °F

Detailed Forecast

This Afternoon

A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Some of the storms could be severe. Sunny, with a high near 95. Heat index values as high as 104. South wind around 10 mph. Chance of precipitation is 30%.

Tonight

Showers and thunderstorms likely, mainly before 1am. Some of the storms could be severe and produce heavy rainfall. Increasing clouds, with a low around 70. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 inches possible.

Monday

A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm. Some of the storms could be severe. Mostly sunny, with a high near 88. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

Monday Night

Mostly clear, with a low around 64. Northeast wind 5 to 10 mph becoming light north northeast after midnight.

Tuesday

Sunny, with a high near 89. East northeast wind 5 to 10 mph.

Tuesday Night

Mostly clear, with a low around 64. East wind around 5 mph becoming south southeast after midnight.

Wednesday

Sunny, with a high near 89. Light southeast wind becoming east southeast 5 to 10 mph in the morning.

Wednesday Night

Clear, with a low around 65. South southeast wind 5 to 10 mph.

Thursday

Sunny, with a high near 91. South southeast wind 5 to 10 mph.