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

Tropical Storm and Storm Surge Warnings for the North Carolina Outer Banks; Heat Building in the West

Storm surge flooding and tropical storm conditions are expected in the Outer Banks beginning late Wednesday. Tropical Storm and Storm Surge Warnings are in effect. Tropical storm conditions are possible along the eastern shore of Virginia Thursday. Hurricane Erin will continue to produce life-threatening surf and rip currents along much of the east coast of the U.S. this week. Read More >

Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Overcast

76°F

24°C

Humidity 77%
Wind Speed NE 8 mph
Barometer 29.98 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 20 Aug 3:55 am CDT
Extended Forecast for

2 Miles SE Denison TX

Heat Advisory August 20, 04:36am until August 20, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 20, 04:36am until August 20, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Overnight

    Low: 76 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 95. Heat index values as high as 103. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 95 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 75. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the morning.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73. Northeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 94. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 94 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. East northeast wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 96. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. Calm wind.
Wednesday
A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 95. Heat index values as high as 103. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 75. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Thursday
Sunny, with a high near 94. Heat index values as high as 103. Calm wind becoming northeast around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 73. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 94. Calm wind becoming northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 72. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 96. Calm wind becoming north northeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. East northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 95.
Sunday Night
Partly cloudy, with a low around 71.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Denison TX
 33.73°N 96.55°W (Elev. 663 ft)
Last Update:
12:24 am CDT Aug 20, 2025
Forecast Valid:
4am CDT Aug 20, 2025-6pm CDT Aug 26, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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