October 1st marks the start of a new water year. The 2016 water year runs October 1, 2015–September 30, 2016. It measures the fall-winter precipitation and the rain that falls in the following growing season all in one 12-month period.
Here is how last year stacks up for Lee Vining precipitation: 11.84 inches, or 84% of average. The remarkable thing is that the fall-winter was the lowest on record, at only 34% of average, meaning the snowpack was the lowest on record. Summer was highest on record, at 285% of average.