I hope I'm not the last to learn of this. I just checked out Riverboss (www.riverboss.com) after seeing it mentioned in the autumn Fly Rod & Reel. It gives handy groupings of water and weather conditions on many rivers, which are grouped by regions and states. Not as much chart info as the "official" weather information sites, but handy and with good graphics. And you can make a list of "My Rivers" for fast reference.