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

Tuesday, 26 June 2018
New Mexico/Santa Fe Room/Portal (La Fonda on the Plaza)
Clifford F. Mass, Univ. of Washington, Seattle, WA; and N. Weber, R. Conrick, and J. Zagrodnik

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.
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