Well, word on the street is this:
Henry's Fork - Green Drakes in the Ranch, Brown and Grey Drakes down low, Caddis and PMD's popping all over. Awesome
South Fork - water at Irwin is 50.5 degrees. Salmonflies start crawling and hatching around 52 - 54 degrees. Remember that temperature gauge is at Irwin, not Heise or Lorenzo. You get the picture.
Teton - clear, warming and fishing. A little bird told us Salmonflies were buzzing around down low. Yellow Sallies, Caddis and a few Mayflies are floating around the upper valley.
Enough said - here is some more info!
Have a great weekend!