Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Partly Cloudy

77°F

25°C

Humidity 56%
Wind Speed Calm
Barometer 30.19 in (1021.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 May 12:53 am EDT
Extended Forecast for

Maryville TN

  • Overnight

    Overnight: Partly cloudy, with a low around 68. Southwest wind around 5 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm.  Chance of precipitation is 50%.

    Low: 67 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm.  High near 84. Calm wind becoming north around 5 mph.  Chance of precipitation is 90%.

    High: 84 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am.  Low around 66. East wind around 5 mph becoming calm.  Chance of precipitation is 80%.

    Low: 66 °F

    Showers then
    Chance
    T-storms

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 8am.  High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then showers likely.  Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 68. Southwest wind around 5 mph.
Tuesday
Mostly sunny and hot, with a high near 90. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 68. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm. Chance of precipitation is 50%.
Thursday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 84. Calm wind becoming north around 5 mph. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Low around 66. East wind around 5 mph becoming calm. Chance of precipitation is 80%.
Friday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 84. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 67. Chance of precipitation is 80%.
Saturday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 83. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 66. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms. High near 85. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms. Low around 66. Chance of precipitation is 80%.
Memorial Day
Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%.
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville TN
 35.76°N 83.99°W (Elev. 886 ft)
1:06 am EDT May 19, 2026
1am EDT May 19, 2026-6pm EDT May 25, 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