Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

A Few Clouds

76°F

24°C

Humidity	77%
Wind Speed	SW 3 mph
Barometer	29.96 in (1013.1 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	77°F (25°C)
Last update	20 Aug 2:53 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles NNW Seymour TN

Overnight
Low: 70 °F
Mostly Cloudy
Thursday
High: 91 °F
Slight Chance
T-storms then
Partly Sunny
Thursday Night
Low: 70 °F
Chance
T-storms then
Showers
Likely
Friday
High: 88 °F
Chance
Showers then
Slight Chance
T-storms
Friday Night
Low: 68 °F
Chance
T-storms then
Partly Cloudy
Saturday
High: 90 °F
Hot
Saturday Night
Low: 67 °F
Partly Cloudy
Sunday
High: 88 °F
Sunny
Sunday Night
Low: 64 °F
Mostly Clear

Detailed Forecast

Overnight

Mostly cloudy, with a low around 70. Calm wind.

Thursday

A slight chance of showers and thunderstorms between 8am and 10am. Partly sunny and hot, with a high near 91. Heat index values as high as 98. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 20%.

Thursday Night

A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%.

Friday Night

A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. North wind around 5 mph becoming calm.

Saturday

Mostly sunny and hot, with a high near 90. Calm wind becoming west around 5 mph in the afternoon.

Saturday Night

Partly cloudy, with a low around 67. West wind around 5 mph becoming calm in the evening.

Sunday

Sunny, with a high near 88.

Sunday Night

Mostly clear, with a low around 64.

Monday

Sunny, with a high near 87.