National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Current conditions at

Knoxville Downtown Airport (KDKX)

Lat: 35.97°NLon: 83.87°WElev: 827ft.

Fair

66°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Jun 12:15 am EDT
Extended Forecast for

6 Miles SSW Mascot TN

  • Overnight

    Overnight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 5am. Mostly clear, with a low around 71. Southwest wind around 5 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Mostly Clear
    then Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 86. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.

    High: 86 °F

    Showers
    Likely then
    T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 68. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 68 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. West wind around 5 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 64. North wind around 5 mph becoming calm. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 66. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Calm wind.
Sunday
Sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph.
Sunday Night
A 30 percent chance of showers after 5am. Mostly clear, with a low around 71. Southwest wind around 5 mph, with gusts as high as 20 mph.
Monday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 86. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
Monday Night
Showers and possibly a thunderstorm. Low around 68. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. West wind around 5 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 64. North wind around 5 mph becoming calm. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 66. Chance of precipitation is 20%.
Thursday
A slight chance of showers, with thunderstorms also possible after 8am. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSW Mascot TN
 35.99°N 83.8°W (Elev. 951 ft)
Last Update:
7:06 pm EDT Jun 20, 2026
Forecast Valid:
12am EDT Jun 21, 2026-6pm EDT Jun 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation