Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

82°F

28°C

Humidity	63%
Wind Speed	SW 8 mph
Barometer	30.04 in (1016.1 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	85°F (29°C)
Last update	20 Aug 11:53 am EDT

More Information:

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

Extended Forecast for

Knoxville TN

This Afternoon
High: 91 °F
Slight Chance
T-storms
Tonight
Low: 70 °F
Chance
T-storms then
Showers
Likely
Friday
High: 89 °F
Chance
Showers then
Slight Chance
T-storms
Friday Night
Low: 69 °F
Chance
T-storms then
Partly Cloudy
Saturday
High: 90 °F
Hot
Saturday Night
Low: 68 °F
Mostly Clear
Sunday
High: 88 °F
Sunny
Sunday Night
Low: 64 °F
Mostly Clear
Monday
High: 87 °F
Sunny

Detailed Forecast

This Afternoon

A 10 percent chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 91. Heat index values as high as 98. West wind around 5 mph.

Tonight

A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Northwest 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 89. Heat index values as high as 96. Calm wind becoming west around 5 mph. Chance of precipitation is 30%.

Friday Night

A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Calm wind.

Saturday

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

Saturday Night

Mostly clear, with a low around 68. West wind around 5 mph becoming calm.

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 87.