Dangerous, Heat Wave Persists in the Eastern U.S.; Severe Weather Expected in the Central Plains and Mid-Atlantic

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorms are expected to produce damaging wind gusts from the Upper Ohio Valley into the Mid Atlantic, and across the central Great Plains this afternoon and evening. Large hail and heavy rain is also possible across the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Partly Cloudy

73°F

23°C

Humidity	84%
Wind Speed	Calm
Barometer	30.06 in (1016.7 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	4 Jul 4:53 am EDT

More Information:

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

Extended Forecast for

Knoxville, McGhee Tyson Airport TN

Heat Advisory July 4, 04:58am until July 4, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory July 4, 04:58am until July 4, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Independence Day
High: 95 °F
Patchy Fog
then Mostly
Sunny
Tonight
Low: 74 °F
Chance
T-storms
Sunday
High: 93 °F
Sunny then
T-storms
Likely
Sunday Night
Low: 73 °F
Chance
T-storms then
Chance
Showers
Monday
High: 90 °F
Slight Chance
T-storms then
Chance
T-storms
Monday Night
Low: 73 °F
Chance
T-storms then
Chance
Showers
Tuesday
High: 89 °F
Chance
T-storms then
T-storms
Likely
Tuesday Night
Low: 72 °F
T-storms
Likely then
Chance
T-storms

Detailed Forecast

Independence Day

Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 95. Heat index values as high as 98. Calm wind.

Tonight

A chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers and thunderstorms likely, mainly after 5pm. Mostly sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.

Monday

A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 50%.

Monday Night

A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.

Tuesday

Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the morning. Chance of precipitation is 70%.

Tuesday Night

Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

Wednesday

A slight chance of showers, then a chance of showers and thunderstorms after 8am. Partly sunny, with a high near 89. Chance of precipitation is 50%.

Wednesday Night

A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 30%.

Thursday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.

Thursday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.

Friday

Showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 70%.