ARkStorm

The ArkStorm is a hypothetical weather scenario that involves a series of intense atmospheric river storms hitting California. It could bring catastrophic flooding and widespread damage to infrastructure, posing significant risks to life and property. The term “ArkStorm” was coined by scientists to illustrate the potential impact of such an event and to emphasize the importance of preparedness and resilience measures.

Wikpedia:
“An ARkStorm (for Atmospheric River 1,000) is a “megastorm” proposed scenario based on repeated historical occurrences of atmospheric rivers and other major rain events first developed and published by the Multi-Hazards Demonstration Project (MHDP) of the United States Geological Survey (USGS) in 2010[1] and updated as ARkStorm 2.0 in 2022.”

Read the USGS report: