Jan 12, 2021
The period from January 10 to 16 continued a pattern of a strong and persistent Aleutian Low pressure system in the eastern Pacific that began December 29, 2020 and which directed the jet stream and primary storm track at Washington State. This resulted in a 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 occur
Source: NOAA National Weather Service Storm Events Database (event 994295). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Snohomish County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.