A raging Bridalveil Fall plummets into Yosemite Valley, closed to the public due to a flooding Merced River, in Yosemite National Park on Saturday, April 7, 2018. And parts of Yosemite National Park remain closed as the Merced River peaks several feet above flood stage through the Yosemite Valley. The storm that started Friday dropped more than 3 inches of rain in the Yosemite Valley, said Brian Ochs, a meteorologist with the weather service in Hanford. All overnight reservations were canceled through Saturday night. "Unfortunately it's a loss of revenue for the park, but safety is the important thing".
The rain was expected to taper off Saturday afternoon, but there remains a threat of mudslides in the Yosemite Valley because of recent wildfires, Ochs said.
The Truckee River also flooded early Saturday morning, according to the weather service. The flooding is expected to affect campgrounds, yards and basements of low-lying homes along the river, she said.
The subtropic atmospheric river could bring up to 3 inches of rain to the Sacramento region and South Lake Tahoe, along with 2- to-4 inches of snow Sunday along the Interstate 80 and Interstate 50 corridors. Downtown San Francisco saw almost 2 inches (5 centimeters) on Friday, making for the fourth-wettest April day since record-keeping began.
This storm's light and steady rainfall was forecast to morph into heavier rain through the day.
A fierce Northern California storm Friday shut down Yosemite National Park, threatened mudslides in wildfire-ravaged wine country and could present the first test of a partially repaired offshoot of the nation's tallest dam that almost collapsed past year. Most facilities reopened at midday, but officials warned that traffic could be slow as cleanup work continues.
To the north, California Department of Water Resources officials warned this week that they may have to use the partially rebuilt spillway at Oroville Dam for the first time since repairs began on the badly damaged structure last summer. The lake quickly filled, and water began flowing over an emergency spillway that had never been used.
The spillway was destroyed a year ago during a crisis that forced the evacuation of downstream towns amid fears of catastrophic flooding. The water level was last at 793 feet and dropping. But a string of late-season storms in March pushed the lake's level higher.
The heaviest rain was in the northern Sierra and in coastal counties from San Francisco north to Mendocino during a 48-hour period beginning Thursday afternoon, the National Weather Service said.
Southern California appears poised to record one of the driest years on record, climatologist Bill Patzert said.
The opener of the San Francisco Giants-Los Angeles Dodgers weekend series was rained out, the first at the Giants ballpark in 12 years.