Henry's Fork

There are four USGS flow stations on the Henry's Fork. The gage at each one indicates lower than normal flow, most of which readings seem significant. Is this a reason for aquatic insect hatches to be inconsistent so far this season? Hmmmm.
Fly Patterns to use:
Pat’s Rubber Legs Black & Brown
Henry’s Fork Foam Stone Salmonfly
Corn-Fed Caddis Tan