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	55%
Wind Speed	W 7 mph
Barometer	30.03 in (1015.6 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	84°F (29°C)
Last update	20 Aug 12:53 pm EDT

More Information:

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

Extended Forecast for

4 Miles SE Karns 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: 91 °F
Hot
Saturday Night
Low: 67 °F
Mostly Clear
Sunday
High: 88 °F
Sunny
Sunday Night
Low: 63 °F
Mostly Clear
Monday
High: 88 °F
Sunny

Detailed Forecast

This Afternoon

A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny and hot, with a high near 91. Heat index values as high as 99. West wind around 5 mph. Chance of precipitation is 20%.

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. West wind around 5 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts of less than a tenth 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 3pm. 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, mainly before 7pm. 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.

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 63.

Monday

Sunny, with a high near 88.