Aug 11, 2024
An upper level shortwave trough destabilized atmosphere environment that led to numerous thunderstorms and heavy rain. Several thunderstorms occurred over the crest of the Cascades near Easy and Rainy Passes that caused multiple flash floods and debris flows off the mountain ridge along and northeast of State Route 20 that buried the highway in multiple locations.
Source: NOAA National Weather Service Storm Events Database (event 1212929). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Skagit County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.