The second storm, forecasters say, could bring thunder and dump up to 2 inches of rain in central and southern valleys, 2 to 4 inches in the foothills and up to 6 inches in some mountain spots.
State water officials plan Thursday to survey the anemic mountain snow pack, and will likely find that California's precipitation is badly lagging what's needed to quench the region's thirst. 2013 was California's driest year on record.
In Nevada, the first of back-to-back storms dropped several inches of snow at Lake Tahoe and up to a foot and one-half on the mountain ridges.
A winter weather advisory was put into effect from 4 p.m. Wednesday to 10 a.m. Thursday for the Reno-Tahoe area, south to Mammoth Lakes.
The second wave of wetter weather begins Friday night into Saturday.
Residents in Truckee and Washoe County are weathering the latest storm Tuesday while still reeling from the effects of the previous storm that hit over the weekend.
The massive winter storm triggered flooding and mudslides throughout Northern California.
The National Weather Service placed the Sierra on flood watch because of continued heavy weather patterns.
Road delays continue across Northern California and Nevada because of additional snow and rain.
(AP) — Freeze watches and warnings are in place throughout much of California as cold, dry air moves through, toppling temperature records.