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.

Overcast

85°F

29°C

Humidity 63%
Wind Speed NW 6 mph
Barometer 29.99 in (1014.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 26 Jul 12:53 pm EDT
Extended Forecast for

4 Miles SW Maryville TN

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 87. Calm wind becoming north around 5 mph.

    High: 87 °F

    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 96. 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. South wind around 5 mph.

    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 25 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 72. Southwest wind 5 to 10 mph becoming light  after midnight.  Chance of precipitation is 60%.

    Low: 72 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A slight chance of showers between 8am and 2pm.  Mostly sunny, with a high near 86. Light north wind becoming northwest 5 to 10 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 67.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly 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 96. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 74. South wind around 5 mph.
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 25 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 72. Southwest wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 60%.
Wednesday
A slight chance of showers between 8am and 2pm. Mostly sunny, with a high near 86. Light north wind becoming northwest 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 66.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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 SW Maryville TN
 35.72°N 84.02°W (Elev. 1115 ft)
1:06 pm EDT Jul 26, 2026
1pm 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