The National Weather Service says a significant storm will bring between a quarter and a half-an-inch of rain to the valley and up to 2.5 inches of rain to the Sierra.
David Rowe with the weather service says there will be snow too.
"Probably about a foot to a foot and a half at the ski areas and maybe 2 to 3 inches down to about 4,500 feet," says Rowe.
Rowe says there are also flooding concerns in areas scarred by wildfire last summer -- for example the Rim Fire near Yosemite.
"When you get heavy rainfall intensity in a short amount of time, you tend to get mud and dust and debris left over from the fires last summer that'll accumulate and run downhill," he says.
Rowe says this will be a significant storm, but the region needs a series of these storms to start recovering from the drought. He says the forecast is dry again for the weekend and early next week.
Rowe urges valley commuters to use caution, especially Thursday morning, when the roads are likely to be slick, and says chains will likely be required in the Sierra.
The weather is about to change. Attached is the NOAA prediction for snow onI-80. Be prepared for winter driving. pic.twitter.com/kEvvfGXHAo— Caltrans District 3 (@D3PIO) January 28, 2014
The latest U.S. Drought Monitor showed no change to drought conditions in California over the past week. But, the report does not include the storm that brought rain to valleys and snow to the Sierra Nevada this week.
Two million Sacramento-area water users conserved 27 percent in October, the same rate as September.
A California law, which was passed to respond to the drought- allows artificial turf on all residential property. But a Sacramento city councilman says the law should allow cities to restrict its use.
There is no change this week to the drought in California, despite the recent storms that have brought snow to the Sierra. Reservoir storage in California remains the second lowest on record.
A new study finds that California’s system for allocating water is fragmented, inconsistent and lacks transparency.