Just saw this article online with some updates on this water year. This is from the SFGate and looks mainly at northern CA, but from SoCal data I was looking at 3-4 weeks ago I would guess that the reservoir levels are similar down here.
It's not a super soaker rain year, but it'll do
Carl Nolte, Chronicle Staff Writer
Tuesday, April 6, 2010
Spring has returned to Northern California, but the rains that drenched the state over the weekend and brought a brisk snowstorm to the Sierra left California with a water glass that's half full.
The spring storm dropped nearly an inch of rain around the Bay Area and 3 feet of powdery snow in the mountains around Lake Tahoe - but the totals add up to an average rainy season, not enough to wipe out the effects of three years of drought. And the end of this year's wet season is in sight.
"It helps," said Frank Gehrke, head of the California Cooperative Snow Survey, "but it's getting pretty late in the season. It is not going to mean a big turnaround."
As California went into the winter season, hopes were high that an El Niño year would produce above-average rainfall and break the drought. Instead, for the most part, the state got average rain and snowfall.
The latest snow survey, taken last week, showed the snowpack at 106 percent of normal, just a bit over average. Rainfall in most places around the state is about the same - average or a little better.
The downpours and snowstorms that roared in on Easter "at best put a nice dent in the drought," said Mike Pechner, a private meteorologist. However, the wet season is pretty much at an end.
"The likelihood (of more storms) drops way off," Gehrke said. "The window of opportunity is pretty much closing."
The average precipitation in April for the northern Sierra, a key index in the state's water supply, is only 3.9 inches, half the total for a normal March.
The season produced mixed results. Shasta Reservoir, the biggest in the state, is at 85 percent of capacity, mostly due to heavy precipitation in the northern mountains. However, Oroville Reservoir on the Feather River, the principal reservoir of the California Water Project is only 48 percent full.
Bay Area water supplies look good. The Marin Municipal Water District reports that its seven main reservoirs are full. The Sonoma County Water Agency's Lake Sonoma is full and Lake Mendocino is at 98.7 percent of capacity.
In the Santa Clara Valley, Guadalupe Reservoir is 80 percent full, and Lexington Reservoir is at 72 percent of capacity.
The National Weather Service is forecasting fair weather for the Bay Area for the rest of the week. The long-range forecast calls for a chance of more snow in the Sierra next weekend.