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

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

78°F

26°C

Humidity 87%
Wind Speed Calm
Barometer 30.03 in (1015.7 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 28 Jun 11:53 pm EDT
Extended Forecast for

8 Miles E Greenback TN

  • Overnight

    Overnight: A 30 percent chance of showers, mainly before 1am.  Mostly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm.  Mostly sunny and hot, with a high near 91. Heat index values as high as 103. Calm wind.

    High: 91 °F

    Chance
    Showers

  • Monday Night

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

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 105. Calm wind becoming north around 5 mph.

    High: 93 °F

    Hot

  • Tuesday Night

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

    Low: 75 °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.

    High: 94 °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 75. Calm wind.

    Low: 75 °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.

    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 75.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 73. Calm wind.
Monday
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Mostly sunny and hot, with a high near 91. Heat index values as high as 103. Calm wind.
Monday Night
Mostly clear, with a low around 74. Calm wind.
Tuesday
Mostly sunny and hot, with a high near 93. Heat index values as high as 105. Calm wind becoming north around 5 mph.
Tuesday Night
Mostly clear, with a low around 75. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94. Calm wind.
Wednesday Night
A 10 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly clear, with a low around 75.
Friday
A 40 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. Partly cloudy, with a low around 74.
Independence Day
A 30 percent chance of showers and thunderstorms. Sunny and hot, with a high near 94.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles E Greenback TN
 35.65°N 84.03°W (Elev. 1001 ft)
7:06 pm EDT Jun 28, 2026
12am EDT Jun 29, 2026-6pm EDT Jul 5, 2026
 
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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