California drought
2013 will enter the history books as the driest calendar year ever in California. The numbers are astounding—and sobering: Since January, Los Angeles has received only 3.6” of rain (average: 14.91”), San Jose 3.8” (average: 14”), San Francisco 5.59” (average: 21.45”). † Normally December is one of our wettest months; this year it’s been one of the driest on record. The snowfall in the northern Sierra Nevada, where most of our water supply comes from, has only been 10% of normal. A persistent high-pressure ridge stretching over a large swatch of the northern Pacific Ocean has been diverting the usual winter storms away from California. Meteorologists see no change for January, which means that precipitation will continue to be far below normal. And even when we finally see some rain it won’t make much of a dent in the water levels of our reservoirs because the soil will suck up most of the moisture, resulting in very little runoff. We need a series of very wet storms to bring us back ...