Sundowners: An extreme fire weather phenomena that occur under typical meteorological conditions along the Central California Coast.

On January 27, 2018 a transient strong wind event occurred on the north side of Lake Quinault on the Olympic Peninsula of Washington State, downing hundreds of mature trees in an area roughly 1 km square. Some of the trees were snapped off at the base and National Park Service personnel estimate that the winds must have reached 70-90 mph. This presentation will describe the synoptic and mesoscale conditions accompanying this event, including high-resolution modeling down to LES resolution. It appears that the strong winds were associated with a transient sub-rotor embedded with a high-amplitude mountain wave that amplified as an occluded front approach the Olympic Mountains.