Rain impact on California's mega reservoirs

The backbones of California's water supply are the six mega reservoirs: Shasta, Oroville, Trinity, New Melones, Don Pedro and San Luis.

Back on November eighth, the state's six biggest mega reservoirs were 33% full.

In normal years they would have been 54% full, but the drought kept them low. Seven weeks later, midnight December 30th, they were up to 34% full.

As of midnight December 31st, the atmospheric river added another percent, up to 35 percent. That's an enormous gain, but still well below where they should be. 

That means that our largest dams remain 65% empty requiring many more storms to get to normal levels...more