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.

Light Rain

72°F

22°C

Humidity	91%
Wind Speed	SE 6 mph
Barometer	30.00 in (1014.7 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Last update	20 Aug 6:53 am EDT

More Information:

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

Extended Forecast for

Alcoa TN

Today
High: 92 °F
Chance
Showers then
Slight Chance
T-storms
Tonight
Low: 71 °F
Chance
T-storms
Friday
High: 90 °F
Chance
T-storms
Friday Night
Low: 69 °F
Chance
T-storms then
Partly Cloudy
Saturday
High: 91 °F
Hot
Saturday Night
Low: 67 °F
Mostly Clear
Sunday
High: 88 °F
Sunny
Sunday Night
Low: 64 °F
Mostly Clear
Monday
High: 88 °F
Sunny

Detailed Forecast

Today

A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 92. Heat index values as high as 101. West wind around 5 mph. Chance of precipitation is 30%.

Tonight

A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday

A slight chance of thunderstorms, then a chance of showers and thunderstorms after 4pm. Partly sunny and hot, with a high near 90. Heat index values as high as 99. 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 69. North wind around 5 mph becoming calm.

Saturday

Mostly sunny and hot, with a high near 91. Calm wind becoming west around 5 mph in the afternoon.

Saturday Night

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

Sunday

Sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.

Sunday Night

Mostly clear, with a low around 64.

Monday

Sunny, with a high near 88.