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

Heavy Rainfall for Portions of the West and Central U.S.; Monitoring Fire Weather Conditions for New England

Tropical moisture continues to flow across portions of the Great Basin, desert Southwest and California. Isolated instances of flash flooding remains possible. Meanwhile, a storm and associated frontal boundary will focus showers and thunderstorms for the center of the nation. For New England, dry and breezy conditions could enhance favorable fire weather conditions. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

72°F

22°C

Humidity 79%
Wind Speed Calm
Barometer 30.13 in (1019.2 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 20 Sep 9:53 am EDT
Extended Forecast for

Alcoa TN

  • Today

    Today: A 20 percent chance of showers after 3pm. Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 10 percent chance of showers before 8pm. Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 65. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 86 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Partly cloudy, with a low around 65. South wind around 5 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 30%.

    High: 86 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers after 3pm. Sunny, with a high near 88. Calm wind.
Tonight
A 10 percent chance of showers before 8pm. Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 65. South wind around 5 mph. Chance of precipitation is 20%.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Partly cloudy, with a low around 65. South wind around 5 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Friday
Showers likely. Partly sunny, with a high near 79. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Alcoa TN
 35.78°N 83.99°W (Elev. 869 ft)
Last Update:
9:56 am EDT Sep 20, 2025
Forecast Valid:
10am EDT Sep 20, 2025-6pm EDT Sep 26, 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