Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Overcast

85°F

29°C

Humidity 59%
Wind Speed NW 10 mph
Barometer 30.00 in (1014.6 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 17 Aug 4:53 pm EDT
Extended Forecast for

6 Miles NNW Tallassee TN

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Sunny and hot, with a high near 92. Heat index values as high as 95. North wind around 5 mph.

    High: 92 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming calm.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming north around 5 mph in the afternoon.

    High: 92 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 92. Calm wind.

    High: 92 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 71. Calm wind becoming southeast around 5 mph.

    Low: 71 °F

    Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 90. Calm wind becoming northwest around 5 mph.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 92. Heat index values as high as 95. North wind around 5 mph.
Tonight
Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming calm.
Monday
Sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 71. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 92. Calm wind.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 71. Calm wind becoming southeast around 5 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Calm wind becoming northwest around 5 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 71.
Thursday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 70.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Tallassee TN
 35.63°N 84°W (Elev. 988 ft)
1:32 pm EDT Aug 17, 2025
4pm EDT Aug 17, 2025-6pm EDT Aug 24, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database