by Greg Long
The article reports on the 1981 UFO sighting/sound recording by Sergeant Russell Yokum (St. Helens (Oregon) Police Department):
Quote from the article:
“It was misty and very cold in the early morning hours (4:03 a.m.) of March 17, 1981, as Sergeant Russell Yokum of the Saint Helens, Oregon, Police Department drove on patrol on Highway 30 west of the Columbia River. Saint Helens is a small mill town about 20 miles northwest of Portland.
NOTE: Thanks go the J. Allen Hynek Center for UFO Studies for their help in this story.”
UFO sound recorded by Sergeant Russell Yokum of the St. Helens (Oregon) Police Department on 17 March 1981:
Source: tom lee (YouTube channel).
St. Helens (Oregon) is located 32 kilometres (20 miles) north-west
of Portland (lib.utexas.edu) (lib.utexas.edu image)