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.

A Few Clouds

65°F

18°C

Humidity 78%
Wind Speed SW 13 mph
Barometer 30.15 in (1020.4 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 25 Dec 9:53 am EST
Extended Forecast for

4 Miles SSE Maryville TN

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 68. Southwest wind 5 to 10 mph.

    High: 68 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Southwest wind around 5 mph.

    Low: 59 °F

    Mostly Cloudy

  • Friday

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

    High: 71 °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 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Partly sunny, with a high near 73. Southwest wind around 5 mph.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. South wind around 5 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers. Mostly cloudy, with a high near 73. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 73 °F

    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: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Showers
    Likely

Detailed Forecast

Christmas Day
Mostly cloudy, with a high near 68. Southwest wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 59. Southwest wind around 5 mph.
Friday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 71. Southwest wind 5 to 15 mph, with gusts as high as 20 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 60. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 73. Southwest wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 56. South wind around 5 mph.
Sunday
A 20 percent chance of showers. Mostly cloudy, with a high near 73. 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
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Maryville TN
 35.71°N 83.94°W (Elev. 988 ft)
Last Update:
6:06 am EST Dec 25, 2025
Forecast Valid:
10am EST Dec 25, 2025-6pm EST Dec 31, 2025
 
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