A series of "pretty impressive storms" rolling over Fresno could drop as much as 3 inches of rainfall by Monday, with another wave bringing more rain next week, said National Weather Service meteorologist James Brotherton.
"It's just multiple waves of precipitation moving through the area," he said. "We'll have some periods where it stops raining for 24 hours, and then rain will come back."
A break in the storm system could come Monday or Tuesday, but another wave is expected on Wednesday.
A flood watch has been issued from Merced to Bakersfield and east to the mountains. The Sierra could get 15 feet of snow above 7,000 feet from the system.
Crews in Fresno and Clovis are prepared for the onslaught.
"We have a fairly robust storm drain system," said Patrick Wie-miller, Fresno public works director. Fresno crews will be checking underpasses and other places where water typically builds up.
Fresno residents can report flooding or trees down to (559) 621-CITY.
Fresno is not handing out sandbags at this time, but by Friday 600 sandbags were given out in Clovis, said Chad Fitzgerald, Clovis Fire Department spokesman.
Free materials for filling sandbags are available at the Clovis Corporation Yard, 155 N. Sunnyside Ave.
Clovis residents can report flooding or storm-related problems to (559) 324-2800.