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 >

Current conditions at

Athens McMinn County Airport (KMMI)

Lat: 35.4°NLon: 84.56°WElev: 874ft.

Fair

36°F

2°C

Humidity 93%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 20 Mar 8:15 am EDT
Extended Forecast for

Watts Bar Dam TN

  • Today

    Today: Increasing clouds, with a high near 75. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 75 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 82. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Chance
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Southwest wind around 5 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 73. North wind around 5 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 75. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Partly cloudy, with a low around 52. Southwest wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 82. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 53. Calm wind.
Sunday
Sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 58. Southwest wind around 5 mph.
Monday
Mostly sunny, with a high near 73. North wind around 5 mph.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Mostly cloudy, with a high near 68.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watts Bar Dam TN
 35.63°N 84.78°W (Elev. 741 ft)
Last Update:
7:06 am EDT Mar 20, 2026
Forecast Valid:
8am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation