Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast across parts of the Upper Midwest into the Great Lakes, the Northeast, and the central High Plains. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

94°F

34°C

Humidity 46%
Wind Speed NE 8 mph
Barometer 30.06 in (1016.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 1 Jul 6:53 pm EDT
Extended Forecast for

3 Miles SW Maryville TN

Heat Advisory July 1, 07:33pm until July 3, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 1, 07:33pm until July 3, 09:00pm

    NOW until 9:00pm Fri

    Heat Advisory

  • Tonight

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: A 10 percent chance of showers and thunderstorms after 5pm.  Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 10 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 74. North wind around 5 mph becoming calm.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 96. Heat index values as high as 107. Calm wind becoming northeast around 5 mph.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am.  Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

  • Independence Day

    Independence Day: 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

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 74. South wind around 5 mph becoming calm.

    Low: 74 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 93.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 74. North wind around 5 mph becoming calm in the evening.
Thursday
A 10 percent chance of showers and thunderstorms after 5pm. Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming northeast around 5 mph in the afternoon.
Thursday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. North wind around 5 mph becoming calm.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. Heat index values as high as 107. Calm wind becoming northeast around 5 mph.
Friday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 73. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Independence Day
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 94. Calm wind.
Saturday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 74. South wind around 5 mph becoming calm.
Sunday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.
Monday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny and hot, with a high near 91. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Mostly sunny, with a high near 89. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 72. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 88. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Maryville TN
 35.72°N 84.02°W (Elev. 1115 ft)
7:07 pm EDT Jul 1, 2026
7pm EDT Jul 1, 2026-6pm EDT Jul 8, 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