Heat Expands for Center of the Nation; Severe Thunderstorms for Plains and Upper Midwest

Dangerous heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest. Critical fire weather for portions of the Intermountain West. Risk for severe thunderstorms and flash flooding across the Upper Midwest/Great Lakes, Ohio Valley, and portions of the mid-Atlantic. Active monsoonal moisture fuels thunderstorms over the Southwest. Hurricane Fausto in the Pacific, should weaken Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fog/Mist

75°F

24°C

Humidity 94%
Wind Speed SW 7 mph
Barometer 29.97 in (1013.7 mb)
Dewpoint 73°F (23°C)
Visibility 4.00 mi
Last update 26 Jul 6:53 am EDT
Extended Forecast for

4 Miles NNE Greenback TN

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before 10am.  Partly sunny, with a high near 87. Calm wind becoming north around 5 mph.

    High: 87 °F

    Chance
    Showers then
    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms between 2pm and 3pm.  Partly sunny, with a high near 89. Heat index values as high as 97. Calm wind becoming north around 5 mph.  Chance of precipitation is 20%.

    High: 89 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 74. Calm wind becoming south around 5 mph after midnight.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after 2pm.  Mostly sunny and hot, with a high near 91. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%.

    High: 91 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am.  Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 71 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A slight chance of showers between 8am and 2pm.  Mostly sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the afternoon.  Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 87. Calm wind becoming north around 5 mph.
Tonight
Partly cloudy, with a low around 71. Calm wind.
Monday
A slight chance of showers and thunderstorms between 2pm and 3pm. Partly sunny, with a high near 89. 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 74. Calm wind becoming south around 5 mph after midnight.
Tuesday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 91. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
A slight chance of showers between 8am and 2pm. Mostly sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Greenback TN
 35.7°N 84.13°W (Elev. 1096 ft)
7:06 am EDT Jul 26, 2026
7am EDT Jul 26, 2026-6pm EDT Aug 1, 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