From Daniel Swain at the California Weather Blog:
“2015 has brought some of the strangest California warm season weather conditions in recent memory.
A significant portion of this can be attributed to a combination of El Niño and more generalized (but even more extraordinary) warmth in North Pacific Ocean. Two major and extremely unusual warm season precipitation events–one in early July, associated with the remnants of Hurricane Dolores, and another more recently in early September associated with the remnants of Hurricane Linda–have already occurred in Southern California. Both have been associated with record-shattering summer precipitation and rare heavy thunderstorms in the Los Angeles and San Diego areas, along with significant out-of-season flooding (even at lower elevations). In some cases, monthly precipitation records have been approached or broken over the course of just 24 or 48 hours–which is pretty incredible from a climatological perspective.
Meanwhile, Northern California has had no such luck. … ”
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