Thanks to William Russ for digging this up.
This was the incident that caused the Milwaukee to put up the high wind indicators.
Allen Miller adds:
"I was working day shift at Tacoma Jct. the morning that this happened, in fact the wrecker was heading east past the shanty as I was getting out of my car after arriving. Train 203H-19 had crossed the Beverly bridge about an hour before the ill-fated 200S-21 and had lost a couple of trailers and didn't even know it. When it came by the shanty about 11 am I noticed the cowling was missing on one of its slave units. When they started switching the train in Tide Flats yard they found the empty flat car and I heard them verifying the van numbers over the block phone, which had been cut in to the wreck site."