Dangerous Heat in the West; Coastal Flooding & High Rip Current Risk through the Weekend on the East Coast; Flash Flooding Concerns in the Southeast and Southwest

A dangerous, record heat wave continues across portions of the West through Tuesday. High rip current risk and dangerous surf continue through the weekend. There are flash flooding concerns through the weekend for portions of the Southeast and Southwest. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Thunderstorm

82°F

28°C

Humidity 63%
Wind Speed SE 13 mph
Barometer 29.93 in (1012.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 22 Aug 5:53 pm EDT
Extended Forecast for

Knoxville, McGhee Tyson Airport TN

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 8pm.  Mostly cloudy, with a low around 70. North wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 3pm.  Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Partly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    T-storms
    Likely then
    Showers
    Likely

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.

    High: 83 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63. West wind around 5 mph becoming north after midnight.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 81. North wind 5 to 10 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 59. North wind 5 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 70. North wind around 5 mph becoming calm in the evening.
Saturday
Showers and thunderstorms likely, mainly after 3pm. Mostly sunny, with a high near 86. Calm wind becoming north around 5 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 63. West wind around 5 mph becoming north after midnight.
Monday
Sunny, with a high near 81. North wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 59. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Knoxville, McGhee Tyson Airport TN
 35.83°N 83.98°W (Elev. 961 ft)
1:38 pm EDT Aug 22, 2025
6pm EDT Aug 22, 2025-6pm EDT Aug 29, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database