Weekend Storm Series – NBC Bay Area
A series of three consecutive storm systems will move through the Bay Area over the weekend, drenching the region with amounts of rain that could lead to minor flooding and landslide risks in some areas.
The first system is expected to make landfall Friday evening across much of the Bay Area, while the second storm will follow on Saturday during the daytime and evening hours, according to the National Weather Service.
Then, after a pause from Saturday night into Sunday morning, the third system is expected to push in a strong jet stream from the Pacific Ocean and will likely produce moderate to heavy rain and gusty southwesterly winds Sunday afternoon into early Monday.
It could also produce thunderstorms on the Peninsula, in the North Bay, and in Santa Cruz, Monterey, and San Benito counties.
“The first and second systems are expected to drop up to an inch (of rain) in the city, and then the third system could reach an inch and a half in the city,” said Roger Gass, a meteorologist with the National Weather Service.
“The North Bay Mountains will of course see heavy rainfall — anywhere from about 7 1/2 inches from the three storms combined,” Gass said.
While the storms contain some subtropical moisture, they are not considered a classic atmospheric river, which typically moves more slowly through the region and then stops.
Frequent rains are expected over the next few days on already saturated soil, which could lead to mudslides and downed trees and power lines.
People should also be prepared for rapidly rising river and stream levels along with “nuisance” minor flooding across the region, according to the weather service.
The San Francisco Department of Building Inspection alerted building owners on Thursday to prepare for the coming storm, specifically asking them to check for any signs of distress around windows.
“As our weather pattern changes, as storms become more violent, we need to take every precaution, we need to warn people, we need to get people prepared for the worst,” San Francisco Supervisor Aaron Peskin said.
In Contra Costa County, residents like Greg Bell are keeping a close eye on the San Ramon Creek, which rose several feet during last year’s storms, causing major flooding in parts of Danville.
Bell says crews did a good job removing debris and trimming branches that could potentially obstruct the creek, leading to flooding during the storm.
He added that it has been disrupted so far due to the recent storms, which is why residents are feeling optimistic as the weekend approaches, but they are still prepared.
“Some neighbors still have their sandbags on hand. To make sure that if we need to spread that stuff out real quick, we can put it around front doors, garages and fences to definitely keep the water out,” he said.