Im still a little concerned about the numbers but I think the drop in passage today can be traced to the spike in river flows.
They were spilling 163,000 cfs today with 388,000+ cfs going through. Those are some very big numbers. The river rose 4 feet between yesterday and today and is starting to drop now.
http://waterdata.usgs.gov/.../uv?site_no=14128870 cfs= cubic foot of water per second
anyone watching the fish cam 2day probably noticed how murky the water was in the windows today. High flows and muddy water=low fish passage.
I would expect another lower river opening until second week in May and thats if the numbers are there.