The Purple Zebra Midge is an excellent pattern to use on Norfork all times of the day. I’ve caught fish until I was tired using this pattern.
I’ve had marginal success with it on Beaver Tailwaters.
UTC 140 purple thread on size 16 hook, silver tungsten bead head and silver ribbing.
Have several of these in your box when on Norfork. They sell them at Two Rivers Fly Shop in Norfork.