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

77°F

25°C

Humidity 88%
Wind Speed SW 5 mph
Barometer 30.00 in (1014.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 26 Jul 8:53 am EDT
Extended Forecast for

Maryville TN

  • Today

    Today: A 20 percent chance of showers and thunderstorms before noon.  Partly sunny, with a high near 88. Heat index values as high as 95. Calm wind becoming north around 5 mph.

    High: 88 °F

    Slight Chance
    T-storms then
    Partly 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 and hot, with a high near 90. Heat index values as high as 97. Calm wind becoming northwest around 5 mph.  Chance of precipitation is 20%.

    High: 90 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75. South wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after 2pm.  Mostly sunny and hot, with a high near 92. West wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%.

    High: 92 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 2am.  Partly cloudy, with a low around 72. Southwest wind 5 to 10 mph becoming light west  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 87. Calm wind becoming north around 5 mph in the afternoon.  Chance of precipitation is 20%.

    High: 87 °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

Today
A 20 percent chance of showers and thunderstorms before noon. Partly sunny, with a high near 88. Heat index values as high as 95. 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 and hot, with a high near 90. Heat index values as high as 97. Calm wind becoming northwest around 5 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 75. South wind around 5 mph.
Tuesday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 92. West 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 2am. Partly cloudy, with a low around 72. Southwest wind 5 to 10 mph becoming light west after midnight. Chance of precipitation is 60%.
Wednesday
A slight chance of showers between 8am and 2pm. Mostly sunny, with a high near 87. Calm wind becoming north around 5 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 88.
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 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville TN
 35.74°N 83.96°W (Elev. 1010 ft)
7:06 am EDT Jul 26, 2026
9am EDT Jul 26, 2026-6pm EDT Aug 1, 2026
 
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Additional Resources

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Hourly Weather Forecast

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