Fishing on the Gunpowder went from great to terrible, then back to pretty darn good again. The city opened a lower reservoir outlet, simultaneously decreasing water temperatures and regulating flows. We are now in a pretty good spot, with inconsistent but frequently very nice sulphur hatches. Pheasant tails (and variants) and small midge or olive nymphs have been very productive when rises are not apparent.
Afternoons have been fishing best, and the whole river seems to be productive at this point.