Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

72°F

22°C

Humidity 91%
Wind Speed Calm
Barometer 29.98 in (1013.8 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 27 Aug 3:53 am EDT
Extended Forecast for

4 Miles WSW Mascot TN

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Partly sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming west around 5 mph.

    High: 90 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers after 2am.  Mostly cloudy, with a low around 68. Calm wind.  Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm.  Mostly cloudy, then gradually becoming sunny, with a high near 88. Calm wind.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 91. Calm wind.

    High: 91 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 92.

    High: 92 °F

    Hot

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny and hot, with a high near 90. Heat index values as high as 95. Calm wind becoming west around 5 mph.
Tonight
A chance of showers and thunderstorms before 1am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 88. Calm wind.
Friday Night
Partly cloudy, with a low around 66. Calm wind.
Saturday
Sunny and hot, with a high near 90. Calm wind.
Saturday Night
Partly cloudy, with a low around 68. Calm wind.
Sunday
Mostly sunny and hot, with a high near 91. Calm wind.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny and hot, with a high near 92.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Mostly sunny and hot, with a high near 93.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Mascot TN
 36.04°N 83.82°W (Elev. 1001 ft)
2:26 am EDT Aug 27, 2026
4am EDT Aug 27, 2026-6pm EDT Sep 2, 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