Whenever our rivers get significant amounts of rain, they tend to clear up in different amounts of time. In my observation, there are five different variables that will determine the best timing for each river . 1) Size of the watershed 2) River gradient 3) Watershed variables  4) River substrate 5) Amount of Water in relation to Time. I will explain each one in detail, but a full understanding of these variables will give you a good opportunity to be on the river that will "fish" the best. This knowlege will save you time, money, and frustration and will keep you catching fish.