Oct 25, 2021
A large upper level low pressure system in the Gulf of Alaska picked up an abundant amount of tropical moisture from the remains of Typhoon Namtheun on October 23. This large upper low then dropped southeast to off the Pacific Northwest coast on during the morning of October 24 then underwent rapid intensification during the afternoon of October 24 resulting in a strong surge of deep tropical moisture being pushed into central California by the evening of October 24. As the upper low tracked i
Source: NOAA National Weather Service Storm Events Database (event 982452). 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.