When all that snow melts I would asume that the rivers would be a little higher this summer and fall. Will this cause the fish to run earlier due to higher water? Could this mean silvers in the rivers by late August early September?
If the snow melts at a steady rate, and not all at once it should be good for the fish. The increased flow will be good for returning fish as-well as out-migrating smolts and steelies. With any luck, the (hopefully) record return of springers to the Columbia system this year will find good water, and their offspring will have good water to ride back to the ocean, resulting in another (bigger?) run three years from now.
The higher snow packs will mean a high/longer snow melt run-off in some of our rivers. Doubt that will change the run timing much but will probably make fishing for spring and summer fish different from the last couple years. Higher water tends to push the fish to the edges and access (especailly for the bankie) to some water more difficult.
By the time our fall show up - fall chinook, coho, chum etc the snow run-off will be over and river flow levels will be more determined by the frequency and size of the fall storms.
One very good thing about the higher snow pack and larger run-off is that we can expect the sound in general to be a more productive habitat for the juvenile salmon hitting it this year. The theory is that a large freshwater input into the sound (river run-off) increases the outflow through the straits which in turn cause a larger counter flow in the depths bring nutrient rich ocean water into the eastern straits and central sound. There the mixing currents of the cold nutrient laden water with the warm surface waters will be more productive than normal resulting in benefits up and down the food chain.. In short the young fish reaching the sound will likely be getting off to a good start.