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 >

Dangerously cold air will be in place across the area through Monday (New Year's Day) morning. To avoid any danger involved with the extreme cold, limit your time outdoors, and cover any exposed skin. If stranded on a road, do not venture outside to seek help. Additionally, be cautious with space heaters. See the below graphics for more winter weather safety tips and information, or visit http://www.nws.noaa.gov/os/cold/during.shtml.