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California Facing Worst Drought on Record
The most populated state in the country is facing what may be its worst drought in a century of record-keeping. On January 20, the governor of California declared a state of emergency, urging everyone to begin conserving water. Water levels in all but a few reservoirs in the state are less than 50% of capacity, mountains are nearly bare of snow except at the highest elevations, and the fire risk is extreme. In Nevada, the situation is much the same.
California has a climate like the Mediterranean region: hot, dry summers and mild, wet winters. More than half of the annual precipitation arrives via winter storms between December and February. For the third winter in a row, precipitation has been below normal across the state. The last week of January is the midway point of the winter wet season, and accumulated precipitation since July is the lowest on record.
The current conditions are the product of several poor wet seasons in succession. The past 30 months—encompassing the past two winter wet seasons and the first half of the current one—are the driest since 1895 for comparable months.
On average, California will accumulate more than 53 inches of precipitation statewide over a typical 30-month span stretching from July to December, based on NOAA Climate Division Data. (Of course, there are huge differences from place to place based on elevation.) In the 30 months preceding December 2013, the state has received closer to 33 inches, just a bit less than the previous record low for a similar period, from July 1975-December 1977.
Check back for updates on the California drought, its impacts, and the climate factors that are influencing the record dry spell.