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 drought in California is causing saltwater to intrude deep into the Sacramento-San Joaquin Delta. Water managers are constructing a rock barrier to prevent salt from affecting drinking water for millions of Californians.
(AP) - The drought that's gripping California is beginning to reshape the landscaping industry. Gov. Jerry Brown is calling for Californians to remove 50 million square feet of turf to save water.
California water regulators are praising some Sacramento-San Joaquin Delta farmers for coming up with a program to voluntarily cut water use.
(AP) - A deadly parasite is thriving in the drought, infecting all the juvenile chinook salmon in the Klamath River in Northern California as they prepare to migrate to the ocean.
The State Water Resources Control Board is considering whether to allow some farmers in the Sacramento-San Joaquin Delta to voluntarily cut back their water use. In exchange, they want the board to agree not to curtail their remaining water.