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.

Light Rain

42°F

6°C

Humidity 85%
Wind Speed SW 3 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 8 Dec 1:53 am EST
Extended Forecast for

Maryville TN

  • Overnight

    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.

    Low: 38 °F

    Showers
    Likely

  • Monday

    Monday: A 40 percent chance of showers, mainly before 2pm. Cloudy, with a high near 44. Calm wind becoming north around 5 mph in the afternoon.

    High: 44 °F

    Chance
    Showers

  • Monday Night

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

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 54. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 54 °F

    Partly Sunny
    and Breezy

  • 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, with gusts as high as 20 mph.

    Low: 31 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Showers

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 before 2pm. Cloudy, with a high near 44. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 27. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 49. Light southwest wind increasing to 5 to 10 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 37. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Partly sunny, with a high near 54. 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 31. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 46.
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. Partly sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville TN
 35.76°N 83.96°W (Elev. 994 ft)
Last Update:
12:31 am EST Dec 8, 2025
Forecast Valid:
2am EST Dec 8, 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