Unfortunately, just the flow numbers aren’t usually sufficient info imo. The sediment levels are quite substantial, and variable, so it’s more like trying to factor in how fast the rivers rose, how high they peaked, how long they peaked, and how quickly they’ve dropped. If that sounds overly complicated, that’s been my experience with trying to guess visibility levels on the main Eel and the south fork. Early in the season it often takes longer to clear up from big flows, and sometimes a lot of moderate flows can help clear some sediment, but there is also variable landslide issues to factor in. It seems to me that the last few years have had a lot more sediment issues from landslides, but that may just be my unfortunate timing. I love fishing there, but it’s a tricky one to hit with good conditions; often another front comes in well before the river clears, and it can easily take two weeks (or more) to clear after a big front hits. I usually just go, but have back up plans in mind, which quite often end up being needed.