Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

42°F

6°C

Humidity 82%
Wind Speed Calm
Barometer 30.00 in (1015.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 8 Dec 12:53 am EST
Extended Forecast for

2 Miles WNW Tallassee TN

Winter Weather Advisory until December 8, 07:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 8, 07:00pm

    NOW until 7:00pm Mon

    Winter Weather Advisory

  • Overnight

    Low: 38 °F

    Showers
    Likely

  • Monday

    Monday: A 40 percent chance of showers, mainly between 10am and 3pm.  Cloudy, with a high near 42. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 42 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27. North wind around 5 mph becoming calm.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 54. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 54 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am.  Mostly cloudy, with a low around 31. West wind 5 to 10 mph becoming light northwest  after midnight. Winds could gust as high as 20 mph.

    Low: 31 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Overnight
Showers likely, mainly between 3am and 5am. Cloudy, with a low around 38. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 40 percent chance of showers, mainly between 10am and 3pm. Cloudy, with a high near 42. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 27. North wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 49. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 37. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 54. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 31. West wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.
Thursday
Partly sunny, with a high near 45.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 33.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Sunny, with a high near 37.
Saturday Night
Mostly clear, with a low around 22.
Sunday
Mostly sunny, with a high near 38.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Tallassee TN
 35.56°N 83.98°W (Elev. 1266 ft)
12:31 am EST Dec 8, 2025
1am EST Dec 8, 2025-6pm EST Dec 14, 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