The National Weather Service says a series of wet systems from the northern Pacific Ocean could bring more than an inch of rain to some areas. The precipitation is likely to continue through the weekend.
A winter weather advisory is in effect Wednesday for Lake Tahoe and much of the Sierra's eastern front where up to a foot of snow is expected by Thursday morning.
The National Weather Service says the heaviest snow is expected during the day Wednesday. Between two and four inches of snow is expected at lake level at Tahoe.
Meanwhile, the snowpack atop mountain peaks in California has a new set of eyes to better gauge the amount of spring runoff. NASA has fixed a twin-engine plane with high-tech equipment to make regular snow surveys in the state.
Snow increasing in mountains today. Images are of expected snowfall totals for today and tonight. http://t.co/KhspxgDEFB— NWS Sacramento (@NWSSacramento) March 26, 2014
Isolated valley t-storms expected later today. Potential for weak funnel clouds and/or tornadoes in Sac Valley. pic.twitter.com/94gPSH9yWp— NWS Sacramento (@NWSSacramento) March 26, 2014
The storm that's been bringing strong winds, heavy rain and snow to much of Northern California over the past four days is weakening.
The California grape harvest dropped seven percent last year from 2014.
A winter storm is forecast to bring mostly rain in the Sierra Nevada Friday, with high snow levels. But Saturday, snow is expected at lower elevations.
The National Weather Service in Sacramento has issued an urban and small stream flood advisory for several counties in the region including: Sacramento, Yolo, Calaveras, Amador, San Joaquin and Stanislaus.
UPDATE 9 a.m.: The thousand-mile coast of California is covered in warnings, watches and advisories for rain, flooding and high surf as another El Nino storm moves in from the Pacific. Winter weather advisories are also in effect in Nevada.