Short report: a great fall day in the Basin. Ended the day with 30 or so fish to hand, 8-19”. Details: Got on the water around 8:30am. Air temp was just above freezing. The sun moved over the walls of the coulee around 10:30am. During that period before sun was on the water I covered some water and dialed in a leech bite in 6-8’ on the outside of a weedy flat (not the 10-12’ deep side). I put 10 fish in the net, all rainbows. A couple were 17-18” DF bruisers, a few 14-16” and a few 9-12” fish that were likely this spring’s new plants. Once the sun was up, the bite shut off (no taper, just done). I went back to covering water and picked up two fish trolling to a spot I wanted to prospect. The next three spots I tried were dead. Finally started picking up some fish again around 1pm when I switched up to my indicator rod but it was borderline fishing . . .a takedown every 10 minutes or so . . . I had to keep moving and the breeze was swirling like a toilet bowl flush; not ideal when using 1 anchor on my Water Master. The W finally decided to make up its mind and gave me a nice chironomid chop out of the south. I moved to a spot that I hoped would allow me to take advantage of a curving weed line. I wanted to be anchored on the deep (14’) flat and hang my bugs in such a way that they would be pushed towards the weeds. This is when I started fiddling with my pattern choice and figured out that I was witnessing a major change in what the fish wanted compared to my last few outings. While the past month’s fishing has been all about finding the fish and putting anything vulnerable-looking in front of them, today they were getting more selective about what to eat. When I took off my #12 flashy olive micro leech and added a #14 slim-profile black callibaetis nymph with no flash, my day got a lot better. I finally got a consistent bite between 2 -3pm and picked up another dozen fish, including my best of the day. That bite died when the W shifted and then went flat. I went back to covering water again (got 0 fish while trolling between spots) and visited another two spots that were unproductive. I ended the day by returning to my first productive spot and giving the leech another go. I found three more small fish and called it day around 6pm as the temperature dropped and the lake was flat calm.