National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Click a location below for detailed forecast.

Last Map Update: Wed, Dec 24, 2025 at 11:14:33 am EST

 

Christmas Week Forecast. Unseasonably warm temperatures the next 3 days. Highs 10 to 20 degrees above normal.
Christmas will be unseasonably warm and cloudy with scattered light rain showers. Highest chances of light rain showers will be north of Interstate 40.
A ridge of high pressure will produce unseasonably warm conditions this week. A series of upper level disturbances will move quickly from the Ohio valley into the central Appalachians through Friday producing a chance of showers this morning, Christmas Day and Friday night. The greatest chance of rain will be mainly north of interstate 40.
A ridge of high pressure will produce unseasonably warm conditions this week. A series of upper level disturbances will move quickly from the Ohio valley into the central Appalachians through Friday producing a chance of showers this morning, Christmas Day and Friday night. The greatest chance of rain will be mainly north of interstate 40.
A ridge of high pressure will produce unseasonably warm conditions this week. A series of upper level disturbances will move quickly from the Ohio valley into the central Appalachians through Friday producing a chance of showers this morning, Christmas Day and Friday night. The greatest chance of rain will be mainly north of interstate 40.
The high temperatures across the region Christmas Day will likely be within the top 10 warmest on record.

 Current Weather Observations...
Location Time
(EST)
Weather Vsby.
(SM)
Temp.
(ºF)
Dewpt.
(ºF)
Hum.
(%)
Wind
(mph)
Wind Chill / Heat Index
(ºF)
Pres.
(in)
Abingdon VA10:55Mostly Clear10595072W 8-30.31
Andrews-Murphy NC10:34Mostly Cloudy10625372CALM-30.34
Chattanooga TN10:53Overcast10645674CALM-30.33
Crossville TN10:53Overcast8625886CALM-30.34
Dalton GA10:55Mostly Clear10615581CALM-30.33
Knoxville TN (McGhee-Tyson)10:53Overcast10615375W 3-30.32
Middlesboro KY10:55Mostly Cloudy10585383CALM-30.33
Monroe Cnty TN10:55Overcast10646088SSW 6-30.32
Morristown TN10:5010605993CALM-30.33
Oak Ridge TN10:53Overcast10605172CALM-30.34
Tazewell Cnty VA10:55Overcast10534985NNW 6-30.33
Tri-Cities TN10:53Partly Cloudy10635267CALM-30.32
Wise VA10:55Overcast10535087NW 5-30.33
Greeneville, TN10:55Partly Cloudy10605582W 6-30.32


Local Weather History For December 24th...
In 1998, 3-day ice storm hit area, 15,000 lost power. $80,000 in damage.

 

 

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