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

Widespread Rain from Texas to the Central Appalachians; Heavy to Excessive Rainfall in Southern California and the Southwest

Scattered thunderstorms and widespread showers are expected from the Texas coast to the central Appalachians today. Heavy to excessive rainfall will continue in southern California into the Desert Southwest through Saturday. Heavy rain will pose a risk of flash flooding, especially across burn scar and urbanized regions. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

63°F

17°C

Humidity 90%
Wind Speed SW 9 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 21 Nov 11:53 pm EST
Extended Forecast for

4 Miles SSW Maryville TN

  • Overnight

    Overnight: Showers likely, mainly after 4am. Mostly cloudy, with a low around 61. Southwest wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 61 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 70. Southwest wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers
    Likely then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47. North wind around 5 mph becoming calm after midnight.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 64. Calm wind becoming north around 5 mph in the afternoon.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 66. East wind around 5 mph becoming calm.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 50. Southeast wind 5 to 10 mph.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Showers. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

Detailed Forecast

Overnight
Showers likely, mainly after 4am. Mostly cloudy, with a low around 61. Southwest wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and noon. Cloudy, then gradually becoming mostly sunny, with a high near 70. Southwest wind around 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Mostly cloudy, with a low around 47. North wind around 5 mph becoming calm after midnight.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 64. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 41. Calm wind.
Monday
Mostly sunny, with a high near 66. East wind around 5 mph becoming calm.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 50. Southeast wind 5 to 10 mph.
Tuesday
Showers. High near 66. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 61.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 34.
Thanksgiving Day
Sunny, with a high near 50.
Thursday Night
Partly cloudy, with a low around 31.
Friday
Mostly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Maryville TN
 35.69°N 84°W (Elev. 1079 ft)
Last Update:
6:06 pm EST Nov 21, 2025
Forecast Valid:
12am EST Nov 22, 2025-6pm EST Nov 28, 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