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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

60°F

16°C

Humidity 84%
Wind Speed SW 5 mph
Barometer 30.17 in (1020.9 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 25 Dec 3:53 am EST
Extended Forecast for

4 Miles ESE Karns TN

  • Christmas Day

    Christmas Day: A slight chance of showers between noon and 1pm. Partly sunny, with a high near 68. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Southwest wind around 5 mph.

    Low: 58 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly before 1am. Patchy fog between 1am and 3am. Otherwise, mostly cloudy, with a low around 59. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Partly sunny, with a high near 72. Southwest wind around 5 mph.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 56. Calm wind becoming southwest around 5 mph in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 71 °F

    Cloudy then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Showers, mainly after 1am. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance
    Showers

Detailed Forecast

Christmas Day
A slight chance of showers between noon and 1pm. Partly sunny, with a high near 68. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 58. Southwest wind around 5 mph.
Friday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 70. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 40 percent chance of showers, mainly before 1am. Patchy fog between 1am and 3am. Otherwise, mostly cloudy, with a low around 59. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 72. Southwest wind around 5 mph.
Saturday Night
Mostly cloudy, with a low around 56. Calm wind becoming southwest around 5 mph in the evening.
Sunday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Showers, mainly after 1am. Low around 42. Chance of precipitation is 80%.
Monday
A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 53.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Karns TN
 35.94°N 84.05°W (Elev. 974 ft)
Last Update:
12:31 am EST Dec 25, 2025
Forecast Valid:
4am EST Dec 25, 2025-6pm EST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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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