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Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Thunderstorm

81°F

27°C

Humidity 69%
Wind Speed N 9 mph
Barometer 29.89 in (1010.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 6 Sep 6:53 pm EDT
Extended Forecast for

2 Miles WNW Knoxville, McGhee Tyson Airport TN

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Northeast wind 5 to 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Labor Day

    Labor Day: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Northeast wind around 5 mph becoming calm.

    High: 88 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm.

    Low: 67 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. South wind around 5 mph.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 91.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 69. Northeast wind 5 to 10 mph.
Labor Day
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Northeast wind around 5 mph becoming calm.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm.
Tuesday
Mostly sunny and hot, with a high near 90. Calm wind.
Tuesday Night
Partly cloudy, with a low around 67. Calm wind.
Wednesday
Sunny and hot, with a high near 91. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 69. South wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 91.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Friday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Friday Night
A chance of thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Knoxville, McGhee Tyson Airport TN
 35.83°N 84.01°W (Elev. 988 ft)
Last Update:
2:26 pm EDT Sep 6, 2026
Forecast Valid:
7pm EDT Sep 6, 2026-6pm EDT Sep 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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