Jan 2, 2021
From December 29 - January 16, a strong and persistent Aleutian Low pressure system developed in the eastern Pacific which directed the jet stream and primary storm track at Washington State that resulted in a rapid series of atmospheric rivers and wind storms that battered Washington State. Water vapor transport into Washington State averaged 160-200% of normal during the period from December 29 through January 16. Numerous periods of heavy rain occurred during the episode, which in turn result
Source: NOAA National Weather Service Storm Events Database (event 993931). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Mason County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.