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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

58°F

14°C

Humidity 84%
Wind Speed SW 9 mph
Barometer 30.26 in (1024.3 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 24 Dec 5:53 am EST
Extended Forecast for

4 Miles W Louisville TN

  • Today

    Today: A 40 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 68. Calm wind.

    High: 68 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers between 3am and 4am. Mostly cloudy, with a low around 58. Calm wind becoming southwest around 5 mph after midnight.

    Low: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Christmas Day

    Christmas Day: A 40 percent chance of showers after 7am. Mostly cloudy, with a high near 68. Southwest wind around 5 mph.

    High: 68 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers. Mostly cloudy, with a high near 69. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers. Cloudy, with a low around 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 73. Southwest wind around 5 mph.

    High: 73 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
A 40 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 68. Calm wind.
Tonight
A 20 percent chance of showers between 3am and 4am. Mostly cloudy, with a low around 58. Calm wind becoming southwest around 5 mph after midnight.
Christmas Day
A 40 percent chance of showers after 7am. Mostly cloudy, with a high near 68. Southwest wind around 5 mph.
Thursday Night
A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm.
Friday
A 30 percent chance of showers. Mostly cloudy, with a high near 69. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 50 percent chance of showers. Cloudy, with a low around 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 73. Southwest wind around 5 mph.
Saturday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59.
Sunday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 30.
Monday
Mostly sunny, with a high near 38.
Monday Night
Mostly clear, with a low around 19.
Tuesday
Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Louisville TN
 35.84°N 84.12°W (Elev. 814 ft)
Last Update:
12:31 am EST Dec 24, 2025
Forecast Valid:
6am EST Dec 24, 2025-6pm EST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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