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.

Partly Cloudy

57°F

14°C

Humidity 90%
Wind Speed S 6 mph
Barometer 30.19 in (1021.8 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 24 Dec 11:53 pm EST
Extended Forecast for

4 Miles W Tallassee TN

  • Overnight

    Overnight: A chance of sprinkles before 2am, then a chance of sprinkles after 4am.  Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Chance
    Sprinkles

  • Christmas Day

    Christmas Day: A chance of sprinkles between noon and 3pm, then a slight chance of showers after 3pm.  Patchy fog between 8am and 10am.  Otherwise, mostly cloudy, with a high near 68. Calm wind becoming southwest around 5 mph in the morning.  Chance of precipitation is 20%.

    High: 68 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, mainly between 7pm and 1am, then a chance of sprinkles after 1am.  Patchy fog between 11pm and 4am.  Otherwise, mostly cloudy, with a low around 58. Calm wind.  Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of sprinkles before 1pm, then a slight chance of showers after 1pm.  Partly sunny, with a high near 70. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.

    High: 70 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly before 1am.  Mostly cloudy, with a low around 60. Southwest wind around 5 mph becoming calm  after midnight. Winds could gust as high as 20 mph.

    Low: 60 °F

    Chance
    Showers

  • Saturday

    Saturday: Patchy fog before 8am.  Otherwise, partly sunny, with a high near 72. Calm wind becoming southwest around 5 mph.

    High: 72 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm.  Mostly cloudy, with a high near 71.

    High: 71 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers.  Low around 36. Chance of precipitation is 80%.

    Low: 36 °F

    Showers

Detailed Forecast

Overnight
A chance of sprinkles before 2am, then a chance of sprinkles after 4am. Mostly cloudy, with a low around 57. Calm wind.
Christmas Day
A chance of sprinkles between noon and 3pm, then a slight chance of showers after 3pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 68. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 20%.
Thursday Night
A chance of showers, mainly between 7pm and 1am, then a chance of sprinkles after 1am. Patchy fog between 11pm and 4am. Otherwise, mostly cloudy, with a low around 58. Calm wind. Chance of precipitation is 30%.
Friday
A chance of sprinkles before 1pm, then a slight chance of showers after 1pm. Partly sunny, with a high near 70. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Friday Night
A 50 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 60. Southwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Saturday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 72. Calm wind becoming southwest around 5 mph.
Saturday Night
Mostly cloudy, with a low around 57. Calm wind.
Sunday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 71.
Sunday Night
Showers. Low around 36. Chance of precipitation is 80%.
Monday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 46.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Tallassee TN
 35.56°N 84.01°W (Elev. 1273 ft)
6:06 pm EST Dec 24, 2025
12am EST Dec 25, 2025-6pm EST Dec 31, 2025
 
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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