Sunday storm continuing to look very impressive across NorCal. Ensembles now agree on an "AR-Cat 5" #AtmosphericRiver making landfall near the SF Bay Area--signifying very high atmospheric water vapor fluxes. Very heavy rain and gusty winds can be expected. #CAwx #CAwater (1/4) pic.twitter.com/1IpRsIrPDJ

— Dr. Daniel Swain (@Weather_West) October 22, 2021