The impending storm is expected to usher in 7 feet of snow in higher elevations. By the end of the week the total for the year could already be up to 20 feet. That means a generous addition to the Sierra Nevada snowpack, a precious water supply that California cities and farms rely on when it melts in the spring and summer.
On Monday, it was at 126% of its average for this time of year, according to the California Department of Water Resources.
“We haven’t seen an event of this magnitude in at least a decade,” state climatologist Mike Anderson said.