From Daniel Swain at the California Weather Blog:
Remember, two blog posts ago, when I mentioned that the recent split of the stratospheric polar vortex might lead to a highly persistent ridging pattern over the Pacific lasting multiple weeks? Well, that did happen…except that the ridge set up farther west than anticipated at the time. Thus, instead of a weeks-long dry and warm spell in California, we’ve been experiencing something close to the opposite: an extended period of wet conditions with well below normal temperatures, characterized by active weather and in some cases very low snow levels. Some of the highest peaks in the San Francisco Bay Area, for example, currently have accumulated a snowpack over a foot deep; the beaches of the North Coast near Eureka and Arcata have experienced accumulating snow twice in the past 10 days; and snowpack in the Sierra Nevada is now slightly above average (this is now genuinely newsworthy in a warming world!). … ”
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