On July 7, 2015, NWS implemented changes to the icons depicted on all of its point-forecast pages. Changes include new icon images with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

A page depicting all of the new icon images can be accessed here: www.weather.gov/forecast-icons

Changes to the icons were based on analysis of 6,700 public comments collected in 2014. Also, many of these changes are based on the results of a research project led by the National Center for Atmospheric Research.

Users are encouraged to continue to provide comments regarding these changes via email at icons@noaa.gov. NWS will continue to analyze incoming feedback and refine the icons as necessary. Any substantial change to the icons will be facilitated through the NWS public comment/review process.

Heat Wave in Central U.S.

Dangerous heat will continue in the Nation's mid-section on Tuesday. Combined with high humidity, this will lead to Heat Index temperatures ranging from 100 to 110 degrees Fahrenheit across parts of the Plains and mid-South. Heat Advisories and Excessive Heat Warnings are in effect. If you must be outside, slow down and drink plenty of water.
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Hazardous Weather Conditions

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

Fair

81°F

27°C

Humidity 71%
Wind Speed S 7 mph
Barometer 29.92 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 28 Jul 3:15 am CDT
Extended Forecast for

Denison TX

  • Overnight

    Overnight: Mostly clear, with a low around 78. South wind around 5 mph.

    Mostly Clear

    Low: 78 °F

  • Tuesday

    Tuesday: Sunny, with a high near 98. Heat index values as high as 101. South wind 5 to 15 mph.

    Sunny

    High: 98 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph.

    Mostly Clear

    Low: 77 °F

  • Wednesday

    Wednesday: Sunny, with a high near 98. Heat index values as high as 101. South wind around 5 mph.

    Sunny

    High: 98 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm  in the evening.

    Mostly Clear

    Low: 75 °F

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms.  Sunny, with a high near 98. Calm wind becoming northeast around 5 mph in the afternoon.

    Slight Chance
    T-storms

    High: 98 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73. Northeast wind around 5 mph.

    Slight Chance
    T-storms

    Low: 73 °F

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 96. East northeast wind around 5 mph.

    Slight Chance
    T-storms

    High: 96 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 73. Northeast wind around 5 mph.

    Partly Cloudy

    Low: 73 °F

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South wind around 5 mph.
Tuesday
Sunny, with a high near 98. Heat index values as high as 101. South wind 5 to 15 mph.
Tuesday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph.
Wednesday
Sunny, with a high near 98. Heat index values as high as 101. South wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 75. East southeast wind around 5 mph becoming calm in the evening.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 98. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Northeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96. East northeast wind around 5 mph.
Friday Night
Partly cloudy, with a low around 73. Northeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny and hot, with a high near 99.
  Click Map For Forecast
Point Forecast:
Denison TX
 33.75°N 96.57°W (Elev. 748 ft)
3:05 am CDT Jul 28, 2015
3am CDT Jul 28, 2015-6pm CDT Aug 3, 2015
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database