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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Greeneville-Greene County Municipal Airport (KGCY)

Lat: 36.2°NLon: 82.81°WElev: 1608ft.

Overcast

55°F

13°C

Humidity 72%
Wind Speed Calm
Barometer 30.27 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 23 Dec 11:15 pm EST
Extended Forecast for

Erwin TN

  • Tonight

    Tonight: A 50 percent chance of showers. Cloudy, with a low around 53. Northwest wind around 5 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. Calm wind.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 53. Calm wind becoming south around 5 mph.

    Low: 53 °F

    Mostly Cloudy
    then Chance
    Showers

  • Christmas Day

    Christmas Day: A 50 percent chance of showers. Mostly cloudy, with a high near 64. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 64 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 65. Calm wind becoming south around 5 mph in the morning.

    High: 65 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55. West wind around 5 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 69.

    High: 69 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 50 percent chance of showers. Cloudy, with a low around 53. Northwest wind around 5 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Mostly cloudy, with a high near 64. Calm wind.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 53. Calm wind becoming south around 5 mph.
Christmas Day
A 50 percent chance of showers. Mostly cloudy, with a high near 64. West wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers. Cloudy, with a low around 55. Calm wind.
Friday
A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 65. Calm wind becoming south around 5 mph in the morning.
Friday Night
A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 55. West wind around 5 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 66.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 50%.
Monday
A 30 percent chance of snow. Mostly sunny, with a high near 34.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Erwin TN
 36.14°N 82.42°W (Elev. 1726 ft)
Last Update:
6:06 pm EST Dec 23, 2025
Forecast Valid:
11pm EST Dec 23, 2025-6pm EST Dec 30, 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