Reel Truth, Chinook from Oregon and Washington feed up as far as cook inlet and out to Kodiak not all of them but enough to say they do frequent the areas. However extensive tag recovery information shows that coho from washington rarely venture into Alaskan costal waters and Oregon coho virtually never do.
Alaska did for a fact expierence a n increase in run size for all spieces at about the same time as oreidawa was in a decline and certainly some of this could be explained by the prevailing ocean conditions.
Having said that I know from expierence that the power and transportation people will simply sieze upon this little spike in the numbers to lobby for the continuation of bussiness as usual.
Some of the Bios have been predicting a rool over in the Gulf of Alaska from fin fish to shell fish favorable enviromental conditions. The bad news fewer salmon for a few cycles, the good news cheaper king crab and shrimp. One of the Bios who made this speculation was at the time in charge of the International Halibut Commission Dr. Hoag.