It would be hard to set a magic number in place. 2000 cfs and dropping is probably going to see something fishable ... 2000 cfs and rising may not, especially in relation to the Bogey.

The watersheds often get different hits from he fronts. The gauge on the Bogey is also many miles downstream of the one on the Calawah, the Sol Duc takes far longer to see a rise than the other two.

Over the years of checking gauges, heights, rainfall forecasts, temps, etc. I can usually get it right about 95% of the time the day before telling guys to come out or not. It's more of an instinct vs. simply deciphering data ... over time you'll get a feel for it. Even then, there are times when the gauges say one thing and the water color says another.