The Lower Deschutes action is best for nymphing throughout the day using tan or olive pupa in the 14-18 range, and a grey pupa size 18 for the abundant micro caddis. Perdigons, CDC guide hares ear, psycho prince, split case PMD (make sure to check out our new jig/perdigon version!) Napoleon’s (especially the yellow one) plus smaller girdle bugs and squirrel leeches and slum lords. 
Evening dry fly fishing is heating up and the magic hour can provide some fabulous choices of dries using tan caddis #14-16, pale evening duns #14, PMD #16, purple haze #14-16 and rusty spinners #16 (the winna spinna is highly visible for dusk) 
Warm Springs to Trout Creek is definitely the spot to be on the lower river for a day trip in terms of water quality and should hold true until bottom releases begin on August 1st which should cool down the lower reaches of the river in a few weeks.