I'm working out in Westport on Wednesday and I'll give it a try then. If my theory holds, that's the first high tide after full dark during a rainy weather period, so they should be in

Surf smelt spawn in the summer just south of the Grays Harbor south jetty, and that's probably what those are - immature surf smelt. Caught enough for a meal for 2 myself the last time I was out - melt in your mouth - sure beat river smelt - those ol' spawnouts are good for nothing but sturgeon bait :p