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

Dangerous Heat in the Central and Eastern U.S.; Critical Fire Weather in the Great Basin and 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 Tuesday across portions of the Four Corners and Great Basin, as dry conditions and gusty winds persist. Read More >

Hazardous Weather Conditions

Current conditions at

Oak Ridge (KOQT)

Lat: 36.02°NLon: 84.23°WElev: 915ft.

Fair

77°F

25°C

Humidity 90%
Wind Speed Calm
Barometer 30.13 in (1018.3 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 29 Jun 11:53 pm EDT
Extended Forecast for

Harriman TN

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

  • Overnight

    Overnight: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 96. Heat index values as high as 107. Calm wind.

    High: 96 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. Calm wind.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 73. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind.
Tuesday Night
Mostly clear, with a low around 74. Calm wind.
Wednesday
Sunny and hot, with a high near 96. Heat index values as high as 107. Calm wind.
Wednesday Night
Mostly clear, with a low around 75. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. Calm wind.
Thursday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.
Friday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 73.
Independence Day
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Sunny and hot, with a high near 94.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
Showers and thunderstorms likely. Mostly sunny and hot, with a high near 90. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harriman TN
 35.93°N 84.56°W (Elev. 761 ft)
Last Update:
7:06 pm EDT Jun 29, 2026
Forecast Valid:
12am EDT Jun 30, 2026-6pm EDT Jul 6, 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