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

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 >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

42°F

6°C

Humidity 79%
Wind Speed W 5 mph
Barometer 30.01 in (1016.7 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 7 Dec 10:53 pm EST
Extended Forecast for

4 Miles NNW Tallassee TN

  • Tonight

    Tonight: A 40 percent chance of showers after 2am. Cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly between 10am and 3pm. Cloudy, with a high near 42. Calm wind becoming north around 5 mph in the afternoon.

    High: 42 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 38. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 52. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 52 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Tonight
A 40 percent chance of showers after 2am. Cloudy, with a low around 39. Calm wind.
Monday
A 30 percent chance of showers, mainly between 10am and 3pm. Cloudy, with a high near 42. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 48. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 38. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 52. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 36. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 47.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Friday
A slight chance of rain before 1pm, then a slight chance of showers after 1pm. Partly sunny, with a high near 43. Chance of precipitation is 20%.
Friday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 32.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Tallassee TN
 35.6°N 83.98°W (Elev. 1480 ft)
Last Update:
6:06 pm EST Dec 7, 2025
Forecast Valid:
11pm EST Dec 7, 2025-6pm EST Dec 14, 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