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 US Bureau of Reclamation says most farmers south of the Sacramento-San Joaquin Delta will face a second year with no water from the Central Valley Project. Some farmers and cities may receive more.
It would not be an odd sight in the spring. But there is something depressing about a closed ski slope in the middle of winter. The trails are bare and grassy. The chairlifts just hang there, waving a little with the breeze.
A new poll finds nearly all Californians think the state's drought is serious -- and there's growing support for mandatory water rationing.
The California drought has state lawmakers looking for creative and affordable ways to increase the state’s water supply. A legislative hearing Wednesday will highlight ways that could make it easier to capture stormwater.
The California Water Resources Control Board heard emotional testimony for at least 12 hours yesterday from people worried about how the state should manage its dwindling supply of water during the drought.