First quarter of 2013 driest at Tahoe in more than 100 years
Ryan Summerlin April 2, 2013
TAHOE/TRUCKEE — A monthly snow survey near Echo Summit got off to an inauspicious start last Thursday morning, with surveyors still able to see a hole punched into the snowpack from February’s measurements.
“Most of the snow on the ground is what fell back in December,” said Frank Gehrke, chief of the California Cooperative Snow Survey program, during the survey at Phillips Station, near the entrance to Sierra-at-Tahoe Ski Resort.
The water content of the statewide snowpack was at 52 percent of its April 1 average. The Phillips Station survey site had just 37 percent of its long-term average water content for this point in the year, according to the data gathered.
January through March 2013 has been the driest January through March on record for much of the Sierra Nevada range, Gehrke said. Records go back to at least the 1920s, he said.
Last week, the National Weather Service in Reno anticipated the driest three-month start to any year on record as measured at Tahoe City.
This week, updated graphs from NWS proved that prediction correct, with Tahoe City seeing just 2.68 inches of precipitation during the first quarter of 2013, making it the driest period since records were kept in 1910.
“A storm the last few days of March brought some much-needed precipitation to the Tahoe Basin; however, it was not enough to avoid being the driest January-March in over 100 years,” according to the graphs.
Tahoe City averages 16.2 inches of precipitation for the time frame. Up until now, the driest January through March for the community was in 1976, when 3.62 inches of precipitation fell, according to the weather service.
November and December storms built water in California’s snowpack up to 134 percent of average by the start of January, but high-pressure systems then became extremely persistent and blocked large storms from coming of the Pacific for much of the winter, Gehrke said.
The snow surveyor expected minor storms this month, but wasn’t hopeful for a miracle April.
“What we’ve got right now is what we’re going to get,” Gehrke said.
He said it would take about 22 inches of rain — or approximately 18 feet of snow — in the next month to catch the state up to historic averages. Snowfall of that magnitude would be “way beyond what we’ve ever seen,” Gehrke said.
Rain and snow showers are possible in the Lake Tahoe Basin through this week, according to NWS, but snowfall is expected to be limited.