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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. 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

40°F

4°C

Humidity 29%
Wind Speed W 7 mph
Barometer 30.30 in (1026.0 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 18 Mar 11:53 am EDT
Extended Forecast for

Mountain Home TN

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 45. West wind around 5 mph.

    High: 45 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 58. Calm wind becoming west around 5 mph in the afternoon.

    High: 58 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.

    High: 68 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50. Southwest wind around 5 mph.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 71. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 71 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 45. West wind around 5 mph.
Tonight
Mostly cloudy, with a low around 33. Calm wind.
Thursday
Mostly cloudy, with a high near 58. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 41. Calm wind.
Friday
Partly sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 50. Southwest wind around 5 mph.
Saturday
Mostly cloudy, with a high near 71. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 53.
Sunday
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 77.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 52.
Monday
A 20 percent chance of showers. Mostly cloudy, with a high near 63.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 40.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountain Home TN
 36.3°N 82.4°W (Elev. 1768 ft)
Last Update:
7:06 am EDT Mar 18, 2026
Forecast Valid:
12pm EDT Mar 18, 2026-6pm EDT Mar 24, 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