National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

82°F

28°C

Humidity 56%
Wind Speed Calm
Barometer 30.03 in (1015.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 25 May 4:53 pm EDT
Extended Forecast for

Louisville TN

Flood Watch until May 26, 03:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until May 26, 03:00am

    NOW until 3:00am Tue

    Flood Watch

  • Memorial Day

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then showers likely. Low around 65. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 65 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before midnight, then showers after 2am. Low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 11am. High near 81. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 82. Calm wind. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely then
    Mostly Cloudy

Detailed Forecast

Memorial Day
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 4am, then showers likely. Low around 65. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and thunderstorms likely before midnight, then showers after 2am. Low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
Wednesday
Showers, with thunderstorms also possible after 11am. High near 81. Light southwest wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 64. Southwest wind around 5 mph becoming calm. Chance of precipitation is 80%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 82. Calm wind. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Louisville TN
 35.83°N 84.04°W (Elev. 863 ft)
Last Update:
2:26 pm EDT May 25, 2026
Forecast Valid:
5pm EDT May 25, 2026-6pm EDT Jun 1, 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