Areas of Excessive Rainfall and Extreme Heat; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding Tuesday. Hot to extremely hot temperatures are in place through Tuesday across much of the western U.S. and northern New England. Tropical Storm Erin is forecast to become a Major Hurricane by this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

74°F

23°C

Humidity	88%
Wind Speed	N 3 mph
Barometer	30.08 in (1017.2 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	12 Aug 1:53 am EDT

More Information:

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

Extended Forecast for

Alcoa TN

Overnight
Low: 72 °F
Chance
Showers
Tuesday
High: 87 °F
Chance
T-storms then
T-storms
Tuesday Night
Low: 72 °F
Showers
Likely then
Chance
T-storms
Wednesday
High: 87 °F
Chance
T-storms and
Patchy Fog
then Showers
Likely
Wednesday Night
Low: 73 °F
Showers
Likely then
Chance
T-storms
Thursday
High: 89 °F
Slight Chance
T-storms then
Chance
T-storms
Thursday Night
Low: 72 °F
Chance
T-storms then
Partly Cloudy
Friday
High: 92 °F
Mostly Sunny
then Chance
T-storms
Friday Night
Low: 73 °F
Chance
T-storms then
Partly Cloudy

Detailed Forecast

Overnight

A chance of rain between 4am and 5am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 10%.

Tuesday

Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm. High near 87. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Showers and thunderstorms likely before 9pm, then showers likely and possibly a thunderstorm between 9pm and 11pm, then a chance of showers and thunderstorms after 11pm. Mostly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 87. Southwest wind around 5 mph. Chance of precipitation is 60%.

Wednesday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

Thursday

A slight chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Calm wind becoming west around 5 mph. Chance of precipitation is 40%.

Thursday Night

A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Calm wind.

Friday

A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92.

Friday Night

A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73.

Saturday

A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 92.

Saturday Night

A 10 percent chance of showers and thunderstorms. Mostly clear, with a low around 72.

Sunday

A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 93.