After a month of huge blizzards and “atmospheric river” storms, the Sierra Nevada snowpack — source of a third of California’s drinking water — is 177 percent of the historic average, the biggest in more than two decades. The last time there was this much snow on Feb. 1 in the Sierra was in 1995. Pete Wilson was California’s governor, “Seinfeld” was the

top-rated show on television and Steve Young had just led the 49ers to a blowout win in Super Bowl XXIX. In a breathtaking shift for a state that had been mired in five years of punishing drought, 25 feet of new snow has fallen on Heavenly ski resort in South Lake Tahoe since New Year’s Day. READ MORE