The forecast is for two days of heavy winds and five to ten inches of rain in the foothills along with a couple of feet of snow in the Sierra.
Those winds could reach 60 miles an hour and could cause falling trees and downed power lines.
Brandi Ehlers with Pacific Gas and Electric says crews are out now trimming branches to eliminate possible problems ahead of the storm.
"We insure to look at areas that may have potential issues with trees or branches coming into lines and identifying those areas and go in there, ones that we may not have access to if there is a heavy enough storm."
Ehlers says the utility with 12 million customers in Northern California is ready to call extra manpower if conditions require it.
"If there is significant outage impact we will definitely have crews come in and restore our customers as quickly and safely as possible."
Ehlers says last month's storms saw few power outages.