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Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

80°F

27°C

Humidity 79%
Wind Speed Calm
Barometer 30.05 in (1016.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 4 Sep 12:53 am EDT
Extended Forecast for

Alcoa TN

Heat Advisory September 4, 01:37am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 4, 01:37am until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind becoming northwest around 5 mph. Chance of precipitation is 20%.

    High: 96 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Northwest wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph in the afternoon.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. Northeast wind around 5 mph becoming calm after midnight.

    Low: 70 °F

    Chance
    T-storms then
    Partly Cloudy

  • Labor Day

    Labor Day: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 74. Calm wind.
Friday
Sunny and hot, with a high near 98. Heat index values as high as 109. Calm wind.
Friday Night
Partly cloudy, with a low around 75. Calm wind.
Saturday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind becoming northwest around 5 mph. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 71. Northwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 70. Northeast wind around 5 mph becoming calm after midnight.
Labor Day
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68.
Tuesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Mostly sunny and hot, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Alcoa TN
 35.78°N 83.99°W (Elev. 869 ft)
Last Update:
1:06 am EDT Sep 4, 2026
Forecast Valid:
1am EDT Sep 4, 2026-6pm EDT Sep 10, 2026
 
Forecast Discussion
 
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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