H
Hydrocephalic
The hard thing is to find days where the wind is not howling. I have been wanting to fish the Columbia all summer but I have not had a free day when the wind was not scaring me. It looks like on an average basis that the wind starts to die down in the gorge starting at some point in September.
If you want no wind Summer Gorge conditions plan for the days PDX is close to 100 degrees. It shuts the wind off over here.
You're right. Fall is interesting in the Gorge. The Summer wind pattern is medium to strong West wind 90% of the time. In Fall it's an equal mix of West, East and no wind days.
One thing to remember about the Gorge is it's about 80 miles long (Troutdale to Arlington). It's often the case where it is nuking at one spot and glassy at another in the morning and those locations might swap conditions over the course of a day.
The current flow of under 100k is the lowest you will see all year. It should last another month or two.