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
As the California drought worsens, more rodents are encroaching on homes and farms in search of water. Animal shelters are advertising feral cats as a 'green' pest control alternative to poisons or traps.
The City of Sacramento wants to create a groundwater master plan that would include drilling more wells.
At least seven large holes have appeared on the Sacramento State campus in recent days. The construction is part of a new special runoff filtration system.
The California Department of Water Resources released a video this week and suggested that the state faces a scary future and potential fifth year of drought.
Citrus growers in California's Central Valley say they expect to fallow between 7 and 9 percent of the state's 270,000 acres of citrus trees because of the drought.