According to a five-station index that includes Calaveras Big Trees and Hetch Hetchy, Mother Lode watersheds in Calaveras and Tuolumne counties have averaged 10 inches of precipitation so far this water year through Wednesday. That works out to 82 percent of average for the date Dec. 26.
No more storms are expected from now through Sunday, Dec. 31.
The storm that moved over the Mother Lode foothills and the rest of the Central Sierra on Monday and Tuesday this week brought from 0.25 to 0.75 inch precipitation to most places in Calaveras and Tuolumne counties.
Major reservoirs in the Mother Lode are 40 to 90 percent full, according to the state Department of Water Resources. On the Mokelumne River, Camanche was 73 percent full and Pardee was 91 percent full. On the Stanislaus River, Donnells was 39 percent full, Beardsley was 36 percent full and Tulloch was 84 percent full.
Also on the Stanislaus River, New Melones, the fourth-largest capacity reservoir in the state, was 74 percent full.
On the Tuolumne River, the level at Hetch Hetchy in Yosemite National Park was falling below 70 percent before Christmas. Don Pedro, the sixth-largest capacity reservoir in the state, was 70 percent full as of Wednesday afternoon.
So far this water year, which began Oct. 1, most of the Central Sierra’s rain and snow came between Thanksgiving and Christmas. The first snow survey of the 2018-19 water year, conducted by the state Department of Water Resources, is expected in late December or early January.
Contact Guy McCarthy at email@example.com or 588-4585. Follow him on Twitter at @GuyMcCarthy.