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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

66°F

19°C

Humidity 65%
Wind Speed SW 7 mph
Barometer 29.91 in (1011.7 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 22 Mar 1:53 am EDT
Extended Forecast for

Alcoa TN

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Southwest wind around 5 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 83. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: A 10 percent chance of showers after 5am. Increasing clouds, with a low around 58. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 58 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 68. Northwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 68 °F

    Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. Northeast wind around 10 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 68. Northeast wind around 5 mph becoming calm in the morning.

    High: 68 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. Calm wind becoming south around 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers before 2pm. Partly sunny, with a high near 70.

    High: 70 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Southwest wind around 5 mph.
Sunday
Sunny, with a high near 83. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 10 percent chance of showers after 5am. Increasing clouds, with a low around 58. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
A 30 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 68. Northwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 43. Northeast wind around 10 mph.
Tuesday
Partly sunny, with a high near 68. Northeast wind around 5 mph becoming calm in the morning.
Tuesday Night
Partly cloudy, with a low around 45. Calm wind becoming south around 5 mph.
Wednesday
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 70.
Wednesday Night
A slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 20%.
Thursday
A slight chance of showers between 8am and 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 58.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 73.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 43.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alcoa TN
 35.8°N 83.96°W (Elev. 856 ft)
Last Update:
2:26 am EDT Mar 22, 2026
Forecast Valid:
2am EDT Mar 22, 2026-6pm EDT Mar 28, 2026
 
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