National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Ophelia Impacting the East; Heavy Rainfall and Severe Threats for the Center of the Nation

Heavy rain, gusty winds, storm surge, high surf and rip currents that could be life threatening, will affect the Mid-Atlantic through this weekend. For the center of the nation, a cold front will focus showers and thunderstorms, some severe with excessive rainfall and flash flooding, through the weekend. Meanwhile, much cooler temperatures and a wet weather pattern enters the Pacific Northwest. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

99°F

37°C

Humidity 37%
Wind Speed S 16 G 21 mph
Barometer 29.79 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 23 Sep 4:50 pm CDT
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

    This Afternoon: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 101. South wind around 15 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms

    High: 96 °F

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Chance
    T-storms

    Low: 76 °F

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 4pm. Some of the storms could be severe. Partly sunny, with a high near 95. Heat index values as high as 101. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Severe
    Thunderstorms

    High: 95 °F

  • Sunday
    Night

    Sunday Night: Showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. Low around 69. East northeast wind 5 to 10 mph. Chance of precipitation is 80%.

    Severe
    Thunderstorms

    Low: 69 °F

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 86. Northeast wind 5 to 10 mph.

    Chance
    T-storms

    High: 86 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 65. Northeast wind 5 to 10 mph.

    Mostly Clear

    Low: 65 °F

  • Tuesday

    Tuesday: Sunny, with a high near 87. Northeast wind 5 to 10 mph.

    Sunny

    High: 87 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 64. East southeast wind 5 to 10 mph.

    Mostly Clear

    Low: 64 °F

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 101. South wind around 15 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Showers and thunderstorms likely, mainly after 4pm. Some of the storms could be severe. Partly sunny, with a high near 95. Heat index values as high as 101. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. Low around 69. East northeast wind 5 to 10 mph. Chance of precipitation is 80%.
Monday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 86. Northeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 65. Northeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 87. Northeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 64. East southeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 88. East southeast wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 89.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Sherman TXSimilar City Names
 33.62°N 96.6°W (Elev. 699 ft)
Last Update:
2:09 pm CDT Sep 23, 2023
Forecast Valid:
5pm CDT Sep 23, 2023-6pm CDT Sep 30, 2023
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation