Haywire is forecast at 9.54 inches for the storm period and NOAA river forecast for both sides of the basin are not showing the peak flows yet in the 10 day forecast. I could be wrong but I think both sides are going to blow out. The upper Chehalis water drag 4 days behind the Satsop so it looks like Satsop will brown out and it will clear but then the upper Chehalis water will arrive and I got to believe it will be a brown out. So hoping I am wrong but the Chehalis fishery is going to get 7 or so days of muddy water if we are lucky. The Satsop always clears fast with this type of event but this guy is a rather large event for September. It will be the upper Chehalis water that determines just how long and just how ugly it is for Chehalis fisheries. If you do the Northwest River Forecast Center hit the 240 rain tab on the right side of your screen it shows the rain in inches. It is about to get wet and ugly!
https://www.nwrfc.noaa.gov/weather/10_day.cgi

https://www.nwrfc.noaa.gov/weather/10_day.cgi