Published: Friday, Mar. 1, 2013 – 12:00 am | Page 2B

The Sierra Nevada snowpack has shrunk to 66 percent of average, according to a survey Thursday by the state Department of Water Resources.

That’s a drop from 134 percent on Jan. 2, a result of the driest January-February period in recorded history in the northern Sierra Nevada.

The state’s major reservoirs hold near-average water supplies as of Thursday, thanks to a wet November and December. But without more storms in the final month of winter, they are likely to shrink rapidly come summertime.

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