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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Bristol / Johnson / Kingsport, Tri-City Regional Airport (KTRI)

Lat: 36.48°NLon: 82.4°WElev: 1519ft.

Partly Cloudy

75°F

24°C

Humidity 76%
Wind Speed N 3 mph
Barometer 29.99 in (1012.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 27 Aug 8:53 pm EDT
Extended Forecast for

Mountain Home TN

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 1am. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 5 mph.

    High: 86 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 89. Calm wind.

    High: 89 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66. Calm wind becoming south around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 90.

    High: 90 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 1am. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 65. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 5 mph.
Friday Night
A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Calm wind.
Saturday
Mostly sunny, with a high near 88. Calm wind.
Saturday Night
Partly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph.
Sunday
Mostly sunny, with a high near 89. Calm wind.
Sunday Night
Mostly clear, with a low around 66. Calm wind becoming south around 5 mph.
Monday
Sunny and hot, with a high near 90.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny and hot, with a high near 91.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 92.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Mountain Home TN
 36.32°N 82.37°W (Elev. 1699 ft)
Last Update:
7:06 pm EDT Aug 27, 2026
Forecast Valid:
9pm EDT Aug 27, 2026-6pm EDT Sep 3, 2026
 
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Additional Resources

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Chance of Precipitation