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

Knoxville, McGhee Tyson Airport TN

  • Overnight

    Overnight: Partly cloudy, with a low around 67. Southwest wind around 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90. Southwest wind 5 to 10 mph.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67. South wind 5 to 10 mph.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 87. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 66. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 50%.

    Low: 66 °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. Northeast wind around 5 mph becoming west in the afternoon.  Chance of precipitation is 80%.

    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 65. East wind around 5 mph becoming calm.  Chance of precipitation is 80%.

    Low: 65 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 8am.  High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then showers likely.  Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 67. Southwest wind around 5 mph.
Tuesday
Mostly sunny and hot, with a high near 90. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 67. South wind 5 to 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Light and variable wind becoming west 5 to 10 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northwest wind around 5 mph becoming calm in the evening. 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. Northeast wind around 5 mph becoming west in the afternoon. Chance of precipitation is 80%.
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 65. 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 83. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 66. 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 65. Chance of precipitation is 80%.
Sunday
Showers and thunderstorms. High near 84. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms. Low around 65. 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:
Knoxville, McGhee Tyson Airport TN
 35.83°N 83.98°W (Elev. 961 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

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Hourly Weather Forecast

National Digital Forecast Database