The Gunpowder is high at 285cfs, 39 F and progressively more stained downstream from Falls road.
The river is a different beast at these levels. Putting lots of weight onto your line is the way to go if nymphing, as the fish are sitting in deep water and will be sluggish. Zebra midges are working well. The issue is getting snagged more often as there is more debris washed into the river waiting to steal your fly.
I think that these levels are great for streamers, sink tip lines make a huge difference in keeping your streamer in the strike zone. The best bet of finding a larger, hungry trout is in the tails of pools and against structures like log jams.