Fished for about 4 hours this morning, in advance of the heat. I found the nymph fishing to be extremely slow. I am sure there was at least one good period during the day, but not for me this morning.
I started in the traditional upper TMA and worked the fast water hard. No fish. There has been a reliable evening spinner fall of late, as evidenced by this spider web:
so, if you are in to that style of fishing, it would be hard to beat a size 20-24 rusty spinner right now towards evening. Water temperature was 58 degrees, flow is still 400 cfs.
I went to the lower TMA for a bit. Nice conditions there for nymphing, but only parr to show for it. Water temperature there was a balmy 68 degrees.
This super warm weather has really pushed the issue towards night fishing. I only landed one brown trout this morning.