Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

78°F

26°C

Humidity	87%
Wind Speed	Calm
Barometer	29.97 in (1013.4 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	5 Sep 2:53 am EDT

More Information:

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

Extended Forecast for

5 Miles SSW Maryville TN

Heat Advisory September 5, 03:06am until September 5, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 5, 03:06am until September 5, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Overnight
Low: 74 °F
Mostly Clear
Saturday
High: 95 °F
Sunny then
Slight Chance
T-storms
Saturday Night
Low: 71 °F
Chance
T-storms then
Partly Cloudy
Sunday
High: 91 °F
Sunny then
Slight Chance
T-storms
Sunday Night
Low: 69 °F
Partly Cloudy
Labor Day
High: 89 °F
Mostly Sunny
then Chance
Showers
Monday Night
Low: 67 °F
Chance
Showers then
Partly Cloudy
Tuesday
High: 90 °F
Hot

Detailed Forecast

Overnight

Mostly clear, with a low around 74. Calm wind.

Saturday

A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Sunny and hot, with a high near 95. Heat index values as high as 105. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.

Saturday Night

A 40 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 71. West wind around 5 mph becoming calm.

Sunday

A 20 percent chance of showers and thunderstorms after 3pm. Sunny and hot, with a high near 91. Heat index values as high as 99. Light northeast wind becoming north 5 to 10 mph in the afternoon.

Sunday Night

Partly cloudy, with a low around 69. Northeast wind 5 to 10 mph.

Labor Day

A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Calm wind becoming east around 5 mph.

Monday Night

A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Southeast wind around 5 mph.

Tuesday

Sunny and hot, with a high near 90.

Tuesday Night

Partly cloudy, with a low around 67.

Wednesday

Sunny and hot, with a high near 91.