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Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Current conditions at

Knoxville, McGhee Tyson Airport (KTYS)

Lat: 35.82°NLon: 83.99°WElev: 981ft.

Fair

73°F

23°C

Humidity 90%
Wind Speed Calm
Barometer 30.11 in (1018.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 16 Aug 5:53 am EDT
Extended Forecast for

4 Miles E Greenback TN

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming north around 5 mph.

    High: 92 °F

    Patchy Fog
    then Sunny

  • Tonight

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

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.

    High: 92 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph in the afternoon.

    High: 93 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 72. Northeast wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph.

    High: 93 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.

    High: 91 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming north around 5 mph.
Tonight
Mostly clear, with a low around 70. Calm wind.
Sunday
Sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 71. Calm wind.
Monday
Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 72. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 93. Calm wind becoming north around 5 mph.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 70.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Greenback TN
 35.66°N 84.11°W (Elev. 971 ft)
Last Update:
1:46 am EDT Aug 16, 2025
Forecast Valid:
6am EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation