Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

78°F

26°C

Humidity 76%
Wind Speed SW 14 mph
Barometer 29.89 in (1011.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Jun 7:53 am EDT
Extended Forecast for

4 Miles WNW Maryville TN

  • Today

    Today: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Mostly cloudy, with a high near 85. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Showers likely before 8am, then a slight chance of showers and thunderstorms between 8am and 10am.  Mostly sunny, with a high near 84. Southwest wind around 5 mph becoming northwest in the morning.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Showers
    Likely then
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62. North wind around 5 mph becoming calm  in the evening.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Calm wind becoming north around 5 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 2am.  Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 2pm.  Mostly sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the afternoon.  Chance of precipitation is 60%.

    High: 86 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm, then showers likely and possibly a thunderstorm after 2am.  Mostly cloudy, with a low around 71. Chance of precipitation is 70%.

    Low: 71 °F

    T-storms
    Likely then
    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm.  High near 81. Breezy.  Chance of precipitation is 100%.

    High: 81 °F

    Showers and
    Breezy

Detailed Forecast

Today
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Showers likely before 8am, then a slight chance of showers and thunderstorms between 8am and 10am. Mostly sunny, with a high near 84. Southwest wind around 5 mph becoming northwest in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Partly cloudy, with a low around 62. North wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 85. Calm wind becoming north around 5 mph.
Saturday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 66. Calm wind.
Sunday
Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 86. Light southwest wind increasing to 5 to 10 mph in the afternoon. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 70%.
Monday
Showers and possibly a thunderstorm. High near 81. Breezy. Chance of precipitation is 100%.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 68. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
A slight chance of thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 10%.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Maryville TN
 35.76°N 84.04°W (Elev. 1099 ft)
7:06 am EDT Jun 18, 2026
8am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database