I think we might be moving past where 'the blob' ocean conditions were bad for some of the salmon populations.
For example, the coho returning this fall have followed this lifecycle:
These coho have been in the ocean from Spring 2019 to Fall 2020 which is well after 'the blob' was reported to have faded away (winter 2016). The parents of this years coho that returned in Fall 2017 would have experienced some of the poor ocean conditions so I think what is critical is how effective spawning was in each area that fall. cheers, roger