Dec 31, 2022
A large upper trough moved slowly through California on December 30 and 31. This system had a deep fetch of tropical moisture associated with it which resulted in a period of moderate to heavy precipitation along with widespread flooding across much of the area on December 31. Numerous reports of flooding and debris flows were reported by law enforcement with several roads being briefly closed as a result of flooding. The system also produced strong wind gusts across the area between the afterno
Source: NOAA National Weather Service Storm Events Database (event 1062377). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Mariposa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.