Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Mostly Cloudy

77°F

25°C

Humidity	71%
Wind Speed	SW 6 mph
Barometer	30.04 in (1015.9 mb)
Dewpoint	67°F (19°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	18 Aug 11:53 pm EDT

More Information:

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

Extended Forecast for

Knoxville, McGhee Tyson Airport TN

Overnight
Low: 68 °F
Patchy Fog
Wednesday
High: 91 °F
Areas Fog
then Sunny
Wednesday Night
Low: 70 °F
Mostly Clear
Thursday
High: 91 °F
Slight Chance
T-storms
Thursday Night
Low: 71 °F
Chance
Showers
Friday
High: 90 °F
Chance
Showers then
Showers
Likely
Friday Night
Low: 68 °F
Showers
Likely then
Chance
T-storms
Saturday
High: 89 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Mostly Clear

Detailed Forecast

Overnight

Patchy fog after 4am. Otherwise, mostly clear, with a low around 68. Calm wind.

Wednesday

Areas of fog before 9am. Otherwise, sunny and hot, with a high near 91. Heat index values as high as 95. Calm wind becoming north around 5 mph.

Wednesday Night

Mostly clear, with a low around 70. Calm wind.

Thursday

A slight chance of showers, with thunderstorms also possible after 11am. Cloudy, then gradually becoming mostly sunny and hot, with a high near 91. Heat index values as high as 97. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 20%.

Thursday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Northwest wind around 5 mph becoming calm. Chance of precipitation is 40%.

Friday

A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 90. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.

Friday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Northwest wind around 5 mph becoming calm. Chance of precipitation is 60%.

Saturday

Mostly sunny, with a high near 89.

Saturday Night

Mostly clear, with a low around 67.

Sunday

Sunny, with a high near 89.

Sunday Night

Partly cloudy, with a low around 65.

Monday

Mostly sunny, with a high near 89.

Monday Night

Partly cloudy, with a low around 67.