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.

Overcast

42°F

6°C

Humidity 76%
Wind Speed NE 3 mph
Barometer 30.00 in (1016.4 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 7 Dec 7:53 pm EST
Extended Forecast for

4 Miles SSE Maryville TN

  • Tonight

    Tonight: A 40 percent chance of showers after 2am. Cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Cloudy then
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before 1pm. Cloudy, with a high near 44. Calm wind becoming north around 5 mph in the morning.

    High: 44 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28. North wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 55. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 55 °F

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 36. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 49.

    High: 49 °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 38. Calm wind.
Monday
A 30 percent chance of showers, mainly before 1pm. Cloudy, with a high near 44. Calm wind becoming north around 5 mph in the morning.
Monday Night
Mostly cloudy, with a low around 28. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 50. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 38. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 55. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
A 20 percent chance of showers before 1am. 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 49.
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 45. Chance of precipitation is 20%.
Friday Night
A slight chance of rain or freezing rain. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 34.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 37.
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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 pm EST Dec 7, 2025
Forecast Valid:
9pm 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