Rain is falling in Merced and a winter storm warning has been issued for the Yosemite area.
The central San Joaquin Valley could see scattered showers and possible thundershowers this afternoon, said Daniel Harty, a meteorologist with the National Weather Service in Hanford. Showers could continue into this evening.
The weather service has issued a winter storm warning today for the Sierra from Yosemite to the Kern County line. That means motorists traveling to the foothills and mountains through Highways 41, 168 and 180 should be prepared with tire chains, said Kirk Arnold, a California Highway Patrol officer.
Interstate 5 over the Grapevine and Highway 58 are open, Arnold said. Snow levels will drop to below 4,000 feet and reach 3,000 feet in some areas, Harty said.
This storm is expected to drop about a quarter-inch of rain on the Valley floor, he said.
Another storm for the Valley and Central California is expected for Sunday night and into Monday morning.