The National Weather Service says Tuesday through Thursday, about a half-an-inch of rain is expected in the valley with an inch or so of rain in the foothills.
Mike Smith with the Weather Service in Sacramento says there's also a chance of thunderstorms and even a tornado.
"This is probably a pretty normal winter storm for a normal season, so it's not going to help a whole lot; it's just one system," says Smith. "The good news is, we do have more on the way. We're expecting more rain coming up this weekend and then possibly some more even going into next week."
He says the region is still a long way from normal when it comes to precipitation - but there's positive news in the forecast.
Smith says the storm is also likely to bring a foot or two of snow to the Sierra. He says gusty winds are possible, and there's a winter storm warning in effect from 3 p.m. today through Thursday morning.
UPDATE 6:40 P.M. - Firefighters continue to make progress on the Washington Fire. As of late Thursday afternoon, containment stood at 15 percent. Crews remain focused on keeping the fire away from the community of Markleeville.
The Sacramento Metropolitan Air Quality Management District said the region's air quality is forecast to be unhealthy for sensitive groups Thursday.
Warmer weather is bringing out snakes, including rattlesnakes, in Northern California.
With high temperatures, people and their pets hit the water to cool down.
Some scattered showers are in the forecast for the Sacramento Valley and throughout Northern California Thursday. While not much precipitation is expected, a winter weather advisory has been issued for elevations above 6,500 feet south of Highway 50.