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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Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

81°F

27°C

Humidity 74%
Wind Speed NE 6 mph
Barometer 30.01 in (1014.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 27 Jul 10:53 pm EDT
Extended Forecast for

5 Miles SSE Karns TN

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 73. Calm wind.

    Slight Chance
    T-storms

    Low: 73 °F

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.

    Chance
    T-storms

    High: 92 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 73. Northwest wind around 5 mph becoming calm.

    Chance
    T-storms

    Low: 73 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 89. Heat index values as high as 95. Calm wind.

    Chance
    T-storms

    High: 89 °F

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 74. Calm wind.

    Slight Chance
    T-storms

    Low: 74 °F

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 88.

    Chance
    T-storms

    High: 88 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 69.

    Slight Chance
    T-storms

    Low: 69 °F

  • Friday

    Friday: Sunny, with a high near 87.

    Sunny

    High: 87 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 66.

    Mostly Clear

    Low: 66 °F

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 73. Northwest wind around 5 mph becoming calm.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Heat index values as high as 95. Calm wind.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. Calm wind.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 88.
Sunday Night
Mostly clear, with a low around 69.
Monday
Sunny, with a high near 89.
  Click Map For Forecast
Point Forecast:
5 Miles SSE Karns TN
 35.9°N 84.09°W (Elev. 1027 ft)
2:51 pm EDT Jul 27, 2015
11pm EDT Jul 27, 2015-6pm EDT 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