Scott P.'s post about the sudden increase in flow around the San Rafel Swell overnight got my attention. I had plans to be down there this morning, but they fell through. Had I gone, I would have been just looking at a forecast, the sky and the amount/speed of water in the canyon I was in. I could have been in for trouble. Can somebody point me to sources of information about how to "read" what area a canyon drains and how to assess flood risk by checking sources of data? Is there a list of Utah canyons and sites to check flow rates?