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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

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

Lat: 36.48°NLon: 82.4°WElev: 1519ft.

Mostly Cloudy

91°F

33°C

Humidity 54%
Wind Speed Vrbl 5 mph
Barometer 30.12 in (1017.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 29 Jun 4:53 pm EDT
Extended Forecast for

Mountain Home TN

Heat Advisory June 30, 11:00am until July 2, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Northwest wind around 5 mph.

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming north around 5 mph.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94. Calm wind becoming north around 5 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind becoming north around 5 mph.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90. Heat index values as high as 96. Northwest wind around 5 mph.
Tonight
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming north around 5 mph.
Tuesday Night
Mostly clear, with a low around 71. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94. Calm wind becoming north around 5 mph.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 72. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind becoming north around 5 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 71.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 71.
Independence Day
A 40 percent chance of showers and thunderstorms. Sunny and hot, with a high near 93.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
Showers and thunderstorms likely. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 71. Chance of precipitation is 60%.
Monday
Showers and thunderstorms likely. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountain Home TN
 36.3°N 82.37°W (Elev. 1900 ft)
Last Update:
2:26 pm EDT Jun 29, 2026
Forecast Valid:
5pm EDT Jun 29, 2026-6pm EDT Jul 6, 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