Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

81°F

27°C

Humidity 45%
Wind Speed SW 18 mph
Barometer 29.89 in (1010.9 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 22 Mar 1:53 pm EDT
Extended Forecast for

Louisville TN

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: A 10 percent chance of showers after 5am.  Increasing clouds, with a low around 57. Southwest wind around 10 mph, with gusts as high as 25 mph.

    Low: 57 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before 7am.  Mostly cloudy, then gradually becoming sunny, with a high near 68. North wind around 10 mph, with gusts as high as 20 mph.

    High: 68 °F

    Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 43. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 68. Northeast wind around 5 mph becoming calm  in the morning.

    High: 68 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers before 2pm.  Partly sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 70 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers before 2pm.  Mostly sunny, with a high near 79.

    High: 79 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 84. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
A 10 percent chance of showers after 5am. Increasing clouds, with a low around 57. Southwest wind around 10 mph, with gusts as high as 25 mph.
Monday
A 30 percent chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 68. North wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Increasing clouds, with a low around 43. Northeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 68. Northeast wind around 5 mph becoming calm in the morning.
Tuesday Night
Partly cloudy, with a low around 45. Calm wind.
Wednesday
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 53.
Thursday
A 20 percent chance of showers before 2pm. Mostly sunny, with a high near 79.
Thursday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 58.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 73.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 42.
Saturday
A 10 percent chance of showers. Mostly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.83°N 84.04°W (Elev. 863 ft)
1:06 pm EDT Mar 22, 2026
1pm EDT Mar 22, 2026-6pm EDT Mar 28, 2026
 
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