Nov 26, 2019
A rapidly intensifying and ultimately record setting low pressure system moved into northern California and the Pacific Northwest in late November. A strong cold front associated with this system swept through the Bay Area bringing heavy rain, roadway flooding, strong winds, low elevation snow, small hail, and large waves to the region. This low set a record for the lowest sea-level pressure ever recorded in the state of California near Crescent City of 973.4 mb. Numerous webcams picked up snow
Source: NOAA National Weather Service Storm Events Database (event 860168). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Contra Costa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.