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

Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Hazardous Weather Conditions

Current conditions at

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

Lat: 36.48°NLon: 82.4°WElev: 1519ft.

Fog

69°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.06 in (1015.3 mb)
Dewpoint 69°F (21°C)
Visibility 0.50 mi
Last update 29 Jun 2:53 am EDT
Extended Forecast for

Johnson City TN

  • Overnight

    Overnight: A 20 percent chance of showers before 5am. Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers between 10am and noon. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 102. Calm wind. Chance of precipitation is 10%.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear, with a low around 71. Calm wind. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    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 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers before 5am. Partly cloudy, with a low around 68. Calm wind.
Monday
A slight chance of showers between 10am and noon. Mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 70. Calm wind.
Tuesday
A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 102. Calm wind. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly clear, with a low around 71. Calm wind. Chance of precipitation is 10%.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 97. Calm wind.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 72. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 99.
Thursday Night
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 71.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 71.
Independence Day
A 40 percent chance of showers and thunderstorms. Sunny and hot, with a high near 95.
Saturday Night
A 40 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 94. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Johnson City TN
 36.34°N 82.4°W (Elev. 1699 ft)
Last Update:
2:26 am EDT Jun 29, 2026
Forecast Valid:
3am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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