Here's how much rain fell in the past 12 hours across the SF Bay Area
A woman walks her dog during a rainfall in Oakland, Calif. on Nov. 9, 2021.
Douglas Zimmerman/SFGATEA weak atmospheric river swept the San Francisco Bay Area on Monday night into early Tuesday, and the National Weather Service said the storm brought a little less rain than forecast.
"I'd say overall it underperformed," weather service meteorologist Jeff Lorber said. "As expected we had the largest accumulations in the North Bay coastal mountains. Totals were generally in the forecast range, but a little less than expected in the Santa Cruz Mountains and the Santa Lucia Mountains on the Big Sur Coast."
Lorber explained that as the storm moved into the South Bay, it fell apart and weakened.
Mount Tamalpais recorded the highest total with 3.32 inches in the last 12 hours. Other totals included 1.96 inches in Cazadero, 1.62 inches in Santa Rosa, 0.92 in the Oakland Hills, 0.82 in Napa, 0.76 in San Francisco, 0.43 in Concord and 0.03 in San Jose.
Lorber said winds arrived a little bit later than expected and weren't quite as gusty as forecast. "We did get some 40-plus mile gusts in East Bay hills," he said.
The storm was much less strong than the Oct. 24 atmospheric river that knocked over trees and flooded roadways. Mount Tamalpais recorded nearly 17 inches across 48 hours with the last big storm.
As of 6:30 a.m., no major damage or flooding was reported as a result of the atmospheric river. The storm knocked out power for some and PG&E's outage map showed a sprinkling of outages across the Bay Area. The storm also caused some internet outages.
Showers are expected to linger through Tuesday afternoon with conditions drying up this evening and staying dry through the weekend.
An atmospheric river is a long and narrow band of water vapor — 300 to 400 miles wide and 500 to 1,000 miles long on average. Climate models suggest in the future California will have more severe atmospheric rivers and longer dry periods between them.
Amy Graff is the news editor for SFGATE. She's a Bay Area native and got her start in news at the Daily Californian newspaper at UC Berkeley where she majored in English literature. She has been with SFGATE for 12 years. You can email her at agraff@sfgate.com.
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https://www.sfgate.com/weather/article/rainfall-totals-atmospheric-river-San-Francisco-16605166.php
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