National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Greeneville-Greene County Municipal Airport (KGCY)

Lat: 36.2°NLon: 82.81°WElev: 1608ft.

73°F

23°C

Humidity 74%
Wind Speed SE 5 mph
Barometer 30.01 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 27 Aug 10:35 pm EDT
Extended Forecast for

Erwin TN

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph.

    High: 85 °F

    Chance
    T-storms and
    Patchy Fog

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 88.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 64. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 85. Calm wind becoming northwest around 5 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 63. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind.
Saturday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. Calm wind becoming southeast around 5 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Calm wind.
Sunday Night
Partly cloudy, with a low around 66. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny and hot, with a high near 90.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
A 30 percent chance of showers and thunderstorms. Sunny and hot, with a high near 90.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Erwin TN
 36.14°N 82.42°W (Elev. 1726 ft)
Last Update:
7:06 pm EDT Aug 27, 2026
Forecast Valid:
10pm EDT Aug 27, 2026-6pm EDT Sep 3, 2026
 
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