
Splintered old growth trees block the July Creek Trail along Lake Quinault in Olympic National Park after being toppled by a mysterious windstorm in the early hours of Jan. 27, 2018.
During the early hours of Jan. 27 more than 100 gigantic old growth trees fell on the north shore of Lake Quinault.
The resulting thud at about 1:30 a.m. was strong enough to register as a small earthquake, according to a seismic monitor at Quinault.
Fallen trees, their splintered trunks left pointing in the air, blocked North Shore Road and damaged utility lines along a 1,000-foot stretch. The sides of the blowdown area were about one half-mile long.
Officials from Olympic National Park knew some sort of wind event was the culprit but nearby weather stations reported only light breezes that night. Radar didn't show any storms.
University of Washington climatologist Cliff Mass investigated the mystery like, in his words, Sherlock Holmes.
The fallen trees in the affected area near July Creek were all facing south. The wind had to come from the north.
"The strong winds could not have been the result of microburst associated with a thunderstorm or strong convection," Mass wrote on his weather blog. "Weather radar showed no such feature and the lightning detection network had no strikes in the region."
Theories abounded on the park's Facebook page: Experimental military equipment, tornado, Sasquatch.














Comment: Olympic National Park's unsolved mystery: What caused over 100 trees to fall down in the middle of the night?