An atmospheric river storm system expected to deliver a blow to Northern California this week has triggered a flood watch, wind advisory and high surf advisory in parts of the Bay Area.
The flood watch is in effect in Sonoma, Napa and Marin counties from 4 a.m. Wednesday through 4 a.m. Saturday, according to the National Weather Service.
Excessive rainfall could cause creeks, streams and rivers to rise, resulting in flooding in some areas, the weather service said. Ponding could also occur in low-lying areas and on roadways.
UPDATE: The Flood Watch has been extended through 4 AM Saturday due to increased confidence in flooding impacts. https://t.co/zYGuRkduL0
— NWS Bay Area 🌉 (@NWSBayArea) November 19, 2024
The wind advisory is in effect across the North Bay, along the San Francisco Bay shoreline, and up and down the Peninsula coastline from 10 p.m. Tuesday until 6 a.m. Thursday, according to the weather service.
Southerly winds gusting up to about 45 mph could cause branches and trees to come down and knock out power in areas.
A Wind Advisory is in effect from 10 PM Tuesday through 6 AM Thursday. Strong southerly winds gusting to 45 mph will result in difficult driving conditions. When combined with the heavy rain, tree damage and related impacts are expected. pic.twitter.com/gX9Wo2xTdW
— NWS Bay Area 🌉 (@NWSBayArea) November 19, 2024
Dangerous coastal conditions prompted the weather service to issue a high surf advisory for beaches up and down the Bay Area coastline, excluding the Santa Cruz area, where a beach hazard statement was issued instead. Both alerts are in effect from 6 a.m. Wednesday to 6 a.m. Friday.
Areas under the high surf advisory could see large breaking waves peaking anywhere from 14 to 19 feet, according to the weather service. Waves at exposed west-facing beaches could climb to 22 feet.
Dangerous wave action associated with the onset of the strong Atmospheric River will result in hazardous swimming and surf conditions the next few days. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. #CAwx pic.twitter.com/vqzYbuFrWk
— NWS Bay Area 🌉 (@NWSBayArea) November 20, 2024
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