California is expecting its first rain of the season this weekend, a major shift in weather that’s likely to bring scattered showers and chilly breezes to the Bay Area, and freezing temperatures and snow to the Sierra.
Long before climate change severely parched California, priming it to burn at a record scale, federal foresters made an inventory of trees in the southern Sierra Nevada. The year was 1911, and the goal of the fledgling U.S. Forest Service was to document the amount of timber in the area. More than a century later, however, the historical data set proved invaluable to researchers with a far different purpose: assessing how much the forest, and the inherent threat of fires within it, had evolved.
California’s mega-drought officially ended three years ago but may have turned the Creek Fire into a monster. By killing millions of trees in the Sierra National Forest, the historic drought that ended in 2017 left an incendiary supply of dry fuel that appears to have intensified the fire that’s ravaged more than 140,000 acres in the southern Sierra Nevada, wildfire scientists and forestry experts said Tuesday.
On a cool February morning, around 60 people gathered in the Sierra Nevada foothills to take part in a ceremony that, for many decades, was banned.
Men and women from Native American tribes in Northern California stood in a circle, alongside university students and locals from around the town of Mariposa. Several wore bright yellow shirts made of flame-resistant fabric. For the next two days, the group would be carefully lighting fires in the surrounding hills.
The economic fallout from the COVID-19 pandemic is affecting urban and rural communities across California. Congress is exploring economic recovery legislation that includes investments in workforce development and infrastructure. And in Sacramento, there have been discussions about focusing future climate and natural resource bonds on economic recovery.
As federal and state decision-makers evaluate the options, they should consider putting Californians to work on improving the health of the state’s headwater forests. This approach would alleviate economic hardships while reducing wildfire risk and generating a suite of other benefits for forest-based communities and the state.
Though the last couple of weekends have seen wet weather, it hasn’t been enough to keep up with the yearly average in time for summer in California. The Sierra Nevada snowpack, which is tested regularly by employees of the California Department of Water Resources, has yielded some grim results so far in 2020 in terms of snow-water equivalent.
On this edition of Your Call’s One Planet Series, we’re discussing a new study from Columbia University about an emerging climate-driven megadrought in the Western US.
Expanding and intensifying drought in Northern California portends an early start to the wildfire season, and the National Interagency Fire Center is predicting above-normal potential for large wildfires by midsummer.
Mountain snowpack has been below average across the High Sierra, southern Cascades and the Great Basin, and the agency warns that these areas need to be monitored closely as fuels continue to dry out. The agency also cites a warm, dry pattern in Oregon and central and eastern Washington, and assigns all of these areas a higher-than-average likelihood of wildfires in July.
The last Sierra Nevada snowpack measurement of the season on Thursday confirmed what California officials have feared for months: The state has suffered through a dry winter.
The state Department of Water Resources announced that the snow was just 1.5 inches deep at its traditional measuring spot at Phillips Station, a vast field off Highway 50 near Echo Summit. The “snow water equivalent” was just a half an inch, or just 3 percent of average for this time of year.
The Phillips measurement was an outlier. A broader measurement taken by 130 electronic sensors throughout the Sierra revealed an average snow water equivalent of 8.4 inches, or 37 percent of average for this time of year.
The last seasonal survey of snow in the Sierra Nevada confirms that California had a dry winter that will leave much-needed runoff levels below normal, authorities said Thursday.
The snow was only 1 ½ inches deep at the traditional manual measuring site at Phillips Station in the range east of Sacramento, and the water contained in it was equivalent to just a half-inch, which is 3 percent of the May average for the location, according to the state Department of Water Resources.
Sierra snow melt typically provides about 30% of the state’s water supply.
More broadly, 130 electronic snow sensors scattered throughout the Sierras indicated that California’s snow pack water equivalent is 37 percent of the May average.
Readings for April also were well below average.
“March and April storms brought needed snow to the Sierras, with the snow pack reaching its peak on April 9, however those gains were not nearly enough to offset a very dry January and February” and the last two weeks of higher temperatures have rapidly reduced the snow pack, said Sean de Guzman, chief of the department’s Snow Survey and Water Supply Forecast Section.
The snow measurements help in predicting runoff into reservoirs that will help meet California’s water demand in the summer and fall, the water agency said.
At the moment, reservoirs are in good shape, with the six largest close to or even above their historical averages. Lake Shasta, California’s largest surface reservoir, is currently more than 80% full, authorities said.
The Water News Network is San Diego County’s source for water news and information.
