The Lower Deschutes is really high this morning. In fact it is poking up in the 7000 cfs range. Typically in the summer we see 3500-4200 cfs. 
From what i’ve heard from people there in the last 2 days is the fishing is still good. 
Stonefly Nymphs seems to be the top producing fly which makes sense based on the hatch getting ready to pop in the next week or two. 
Perdigons and Jigs, Squirmey’s, Soft Hackle PT and Flashback PT, Green Rock Worms, Prairie Dog Pupa and Graphic Caddis are some other nymphs we suggest now too. Sculpins and Wooly Buggers are good swinging flies, and may be worth stripping in some pools and eddies and seams along the riffles. 
My best guess for when the fish will be up on the stonefly dries is the 3rd week of May and it will last until Mid June this year.. Just a guess.