Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

86°F

30°C

Humidity 51%
Wind Speed SW 8 mph
Barometer 30.04 in (1016.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 24 Jul 4:53 pm EDT
Extended Forecast for

Louisville TN

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 86. West wind around 5 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Mostly cloudy, with a low around 69. West wind around 5 mph becoming calm.

    Low: 69 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers before 2pm.  Partly sunny, with a high near 84. Calm wind.

    High: 84 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. Calm wind.  Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Monday

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

    High: 90 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. West wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 69. West wind around 5 mph becoming calm.
Saturday
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 84. Calm wind.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 88. Calm wind.
Sunday Night
Partly cloudy, with a low around 70. Calm wind.
Monday
Mostly sunny and hot, with a high near 90. Calm wind.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 72.
Wednesday
A 10 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 69.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.83°N 84.04°W (Elev. 863 ft)
2:26 pm EDT Jul 24, 2026
5pm EDT Jul 24, 2026-6pm EDT Jul 31, 2026
 
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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