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Snowpack 'Growing Nicely' In Sierra

@CA_DWR / Twitter

The second Sierra snowpack measurement of the winter was conducted by the California Department of Water Resources Feb. 2 at Phillips Station off Highway 50 near Sierra-at-Tahoe Road.

@CA_DWR / Twitter

The latest measurement of Sierra Nevada snowpack Tuesday showed that "snowpack is growing quite nicely."

Frank Gehrke, chief of the California Cooperative Snow Surveys Program for the California Department of Water Resources, says the snowpack measurement was 130 percent of average at Phillips Station off Highway 50 near Sierra-at-Tahoe Road.

He says the storms are making a difference in building snowpack so far this winter.

"These are not major storms, but they are making a difference in terms of snowpack accumulation," Gehrke says.

Gehrke says "this snow is not going anywhere" and will be important for "reservoir recovery."

February 2, 2016 Snow Survey from California DWR on Vimeo.

Both the depth and water content at Phillips Tuesday were the highest since 2005, when a depth of 77.1 inches and water content of 29.9 inches were recorded, according to the DWR.

Snow Survey 1 020216 P

It was snowing during the second snow survey of the winter conducted by the Department of Water Resources Feb. 2 at Phillips Station off Highway 50 near Sierra-at-Tahoe Road.  California Department of Water Resources / Courtesy

In April 2015, the Sierra snowpack was minimal to non-existent. And the spring and summer runoff was called "paltry" by Gehrke.

The DWR says "rainfall and the Sierra Nevada snowpack’s water content are both markedly improved this water year, and storage in the state’s major reservoirs also has increased significantly since January 1."

The agency says rainfall in the three regions tracked continuously by DWR was 123 percent of the historical average between October 1 and January 31. 

"While precipitation this water year is improved over last year, that’s not to say California’s long drought is over," cautioned the DWR. "Most of the state’s major reservoirs still hold much less than their historical averages for early February. Californians are encouraged to continue their water conservation."

Reservoir Conditions 020216.JPG

The snowpack at the start of February and March 2015 was only 23 percent and 19 percent of average respectively on those dates, according to the DWR.

By April 1, 2015, "when the snowpack normally is at its peak, electronic readings showed the snowpack’s water content was only 5 percent of normal for that date, the lowest on record," the state agency reported. "The scant snowpack and subsequent drop in snowmelt runoff were large contributors to confirming California’s fourth consecutive year of drought."

The first Sierra snow survey of the winter in December 2015 by the DWR showed snowpack at 136 percent of the long-term January average.  

Snowpack supplies about 30 percent of California’s water.

Reservoir storage and snowpack have benefited from storms in January, but DWR officials say it’s far too soon to know whether enough precipitation will have fallen by the end of winter’s wet season to significantly impact the long-term drought in California.

 

Snow Water Equivalent.JPG

 

 

Meteorologist Michelle Mead with the National Weather Service in Sacramento, says more snowpack is needed in the northern Sierra, where the state's largest reservoirs are located, to provide water supply in the spring and summer.

 

North Sierra Precipitation.JPG


Average Snow Water Content 1950-2015

Source: California Department of Water Resources