Of course, the condition can vary one season to the other and depend on each winter's snow accumulation. When it doesn't look good, I won't run a trip. When it looks like ready to go, most of the times I have good judgement calls as I have learned the character and behavior of Yellowstone Cutthroat and streams where they live.
It took us a while but we finally figured out where they are and
I admit I couldn't identify with scientific names but I should be close and at least and practically speaking I have flies to match them.
This may be one of Baetis species.
I'm sure the further left is PMD, the middle one is the smaller one above (baetis), and the further right is the Giant one right above.
Above being said, on this day, winds were very very uncomfortable and totally uncooperative😟This angler worked hard and achieved the best available with a dry-fly👏😎👍
Now I know next comes "wave" phases😶But then I learned and developed my systems to get away or get along with it😏
Maybe see you on the steam👋