The North Bay saw record rainfall last week, which is good news for the state’s water supply that has been healthy for the past two years after a lengthy drought.
The heavy precipitation was still visible in the increased volume of water flowing in a number of Marin County creeks and waterfalls Tuesday.
A “rather impressive system” is setting the stage for what could be California’s first atmospheric river storm of the season, the National Weather Service said Sunday. An atmospheric river carries water vapor from the tropics and, when it makes landfall, can bring a vast amount of rain and snow; in Oct. 2021, for instance, San Francisco got 750% more rainfall than an average year after a powerful atmospheric river passed through the region.
Because the movements of atmospheric river storms are difficult to predict, meteorologists are still refining the forecast. As of Sunday morning, “confidence is high” that northern parts of the North Bay “will be impacted by the strong atmospheric river beginning Wednesday, but these impacts could shift slightly southward closer to the SF Bay,” the weather service said.
Atmospheric river-fueled storms have hammered the network of hundreds of levees in coastal counties near the San Francisco Bay — from the agricultural fields of Monterey County to urban places like San Leandro, Walnut Creek and Richmond to more rural parts of the North Bay. At least two major levees, in Salinas and Pajaro, have failed since New Year’s Eve.
The levee breach along the Pajaro River, which divides Santa Cruz and Monterey counties, left the entire town of Pajaro in a deluge of water.
North Bay farmers, fire agencies and other water stakeholders prepare to enter a new year hoping to avoid a “Groundhog Day” movie-like repeat of events akin to 2022’s. 2022 ended much like 2021, with downpours creating a sense of optimism of more consistent rain. However, if early 2023 weather patterns mimic 2022’s, the fear exists that the North Bay will see more drought in the coming years.
If it looks like something that could transport you into the future, in a sense it is. A spaceship-sized hoop suspended from a helicopter is actually part of an advanced water detection system. The information it’s gathering, could help determine the future of California’s water supply – and where we store it.
“I’ve seen similar studies that say, ‘Hey, let’s not even think of building more above ground reservoirs. Let’s use all the empty space below,'” says Rosemary Knight, Ph.D., a professor of Geophysics and senior fellow at the Woods Institute for the Environment at Stanford University.
