The Southwest U.S. is mired in an ever-worsening drought, one that has left deer starving in Hawaii, turned parts of the Rio Grande into a wading pool, and set a record in Colorado for the most days of “exceptional drought.”
Parts of the world economy may have been on pause during 2020, dampening greenhouse gas emissions for a while. But that didn’t slow the overall buildup of atmospheric carbon dioxide, which reached its highest level in millions of years.
If anything, research during the year showed global warming is accelerating. Symptoms of the fever include off-the-charts heat waves on land and in the oceans, and a hyperactive and destructive Atlantic hurricane season.
A dry start to California’s water year is reflected in the season’s first snow survey of the Sierra Nevada snowpack. The statewide snowpack is 52% of average for Dec. 30. On average, the Sierra snowpack supplies about 30% of California’s water needs.
“The first snowpack survey of the water year points to California’s climate variability, which is why a diverse water portfolio is needed to provide a reliable supply,” said Goldy Herbon, San Diego County Water Authority senior water resources specialist. “The Water Authority and its 24 member agencies have successfully diversified water sources, and continue to expand those sources, to ensure our supply meets the needs of the region’s 3.3 million people and its $245 billion economy.”
A dry start to California’s water year is reflected in the season’s first snow survey of the Sierra Nevada snowpack. The statewide snowpack is 52% of average for Dec. 30. On average, the Sierra snowpack supplies about 30% of California’s water needs.
The California Department of Water Resources manual survey at Phillips Station recorded 30.5 inches of snow depth and a snow water equivalent of 10.5 inches, which is 93% of the January 1 average at that location, according to DWR officials. The snow water equivalent,or SWE, measures the amount of water contained in the snowpack and is a key component of DWR’s water supply forecast.
While the Phillips Station measurement was positive, DWR’s electronic readings from 130 stations placed throughout California show the statewide snowpack’s SWE is 5 inches, or 52% of the December 30 average.
“The snow survey results reflect California’s dry start to the water year and provide an important reminder that our state’s variable weather conditions are made more extreme by climate change,” said DWR Director Karla Nemeth. “We still have several months left to bring us up to average, but we should prepare now for extended dry conditions. The Department, along with other state agencies and local water districts, is prepared to support communities should conditions remain dry.”
“The first snowpack survey of the water year points to California’s climate variability, which is why a diverse water portfolio is needed to provide a reliable supply,” said Goldy Herbon, San Diego County Water Authority senior water resources specialist. “The Water Authority and its 24 member agencies have successfully diversified water sources, and continue to expand those sources, to ensure our supply meets the needs of the region’s 3.3 million people and its $245 billion economy.”
The supply sources include water from the Claude “Bud” Lewis Carlsbad Desalination Plant, where ten workers volunteered to live on-site in 2020 to keep the water flowing during the coronavirus pandemic.
When the Sierra Nevada snowpack melts, it feeds into rivers and is stored in reservoirs across California. Reservoirs are tapped as needed during the dry months. However, state officials again said that climate change is affecting California’s snowpack, as more precipitation falls as rain and less as snow. And they urged Californians to make water conservation a “way of life.”
“Today’s survey brought a first glimpse of how the state’s snowpack is shaping up, but there is a lot of winter still ahead,” said Sean de Guzman, chief of DWR’s Snow Surveys and Water Supply Forecasting Section. “While the dry conditions during late summer and fall have led to a below average snowpack, it is still encouraging to have the amount of snow we already have with two of the three typically wettest months still to come.”
DWR conducts five snow surveys at Phillips Station each winter near the first of each month, January through April and, if necessary, May. Guzman said the next survey is scheduled for February 2.
Sean De Guzman (R), chief of the California Department of Water Resources Snow Surveys and Water Supply Forecasting Section, and Jeremy Hill, DWR water resources engineer, conduct the first snow survey of the 2021 season at Phillips Station in the Sierra Nevada. Photo: Kelly M. Grow/DWR
A month into California’s peak storm season, the lack of wet weather is beginning to weigh on the state’s water supply.
The snowpack in the Sierra and southern Cascades, which provides as much as a third of the water used by California cities and farms, is about 55% of average for this time of year. It hasn’t been this low at this time since 2017, when the state was emerging from a five-year drought.
Barely any rain and it’s already mid-December? Malibu is experiencing drought conditions—but a drought it is not. That’s a key difference: a “drought” can actually only be declared by the Governor of California; his declaration releases key relief funding for several agencies. “Drought conditions,” on the other hand, is a classification that marks a series of factors that could lead to a drought down the line.
Santa might be able to lose the heavy red coat when he makes his rounds in the Southland, and he probably won’t need an umbrella either.
The extended outlook from the National Oceanic and Atmospheric Administration favors above-average temperatures and below-average precipitation in the Los Angeles region from Dec. 24 through Dec. 30.
It’s possible that San Diego County won’t receive significant rainfall during December, which would significantly elevate the wildfire danger throughout the region, according to the National Weather Service.
“The storms that have been forming off the Pacific Northwest are not dropping into Southern California,” said Dan Gregorio, a weather service forecaster.
The Bay Area awoke to the pitter-patter sound and pleasant smell of rain Sunday as the first significant storm system of the season moved through the area, bringing much-needed moisture to a largely dry region. Meteorologist Brooke Bingaman with the National Weather Service said that the rain system that passed through the Bay Area over the weekend will give way to dry conditions for Monday and Tuesday before an even wetter system could come through Wednesday into Thursday.
The latest outlook from the National Oceanic and Atmospheric Administration suggests that California’s persistent drought-like conditions could last through the winter and into spring, possibly fueling another grueling fire season in 2021.
Currently, three-quarters of California is experiencing at least moderate drought conditions.
“Keep in mind, we’re coming off the driest May-through-October period, statewide at least, across California, Arizona and New Mexico,” said Mark Svoboda of the National Drought Mitigation Center in Nebraska.
Forecasting three to four months out is a dodgy proposition for scientists, but NOAA’s modeling shows the likelihood of relatively dry weather through February.
The Water News Network is San Diego County’s source for water news and information.
