Here is some great info from Dr. Rob Van Kirk’s Henry’s Fork Watershed SWE report filed June 25th. Hatch timing is accelerating again after slowing down for a few days early last week and is near average at most locations. Green Drakes are slowing down on the lower river (downstream of Warm River) but are hatching upstream. A few flavs have been seen on the lower river. Small numbers of Gray Drakes are still hatching in the lower watershed. Brown Drakes have been reported in the Osborne Bridge area. Unfortunately, hot sunny weather has not produced the best conditions for mayfly dun emergence recently, while strong winds have not produced the best conditions for spinner falls either. Pro tip for avid readers who have stuck with the report this far: clouds, cooler temperatures and maybe a few showers are in the forecast for tomorrow, with slightly lighter winds than we have seen recently. That should produce near-optimal conditions for emergence of mayfly duns of several different species tomorrow on all river reaches.
The upper river is hosting its usual month of June fly fishing crowds, so your “on the water diplomacy” will be tested whether you wade or fish from a boat. Water quality is good with near or a bit below normal flows but these can vary throughout the irrigation season.
