I've jumped in rain, not a big deal besides the discomfort. High winds (esp with stock round canopies) are a different story.
Ask ANY windsurfer or kiteboarder about the Gorge. It has its own Venturi weather and can be wildly different from the surrounding areas in terms of wind. It's where people go to set sailing speed records.
Kermit, what kind of acft was your ANG unit flying back then? I have friends who were PJs (para-rescue jumpers) with the 129th ANG Air Rescue Squadron at Moffett Field CA. HC 130 Hercs with air refueling gear for helos.
377
I have driven through the Columbia River Gorge east of Portland several times. After initially hearing the horror stories, I made my first drive through it during daylight hours so I could get a good view of the terrain on each side of the river.
Frankly, I don't see any cause for a significant venturi effect or anything that would cause a major difference from the weather in the Portland area. The gorge is typically about a mile wide at the river level and the adjacent land is relatively low.
For the record, I doubt if Mt. Hood has any effect of consequence on the gorge weather. The aerodynamics just don't work out. And I treat violent weather with plenty of respect.
Personally, I have been in extremely violent thunderstorms in the midwest and western states. I have never seen a tornado funnel on the ground although I may have seen one aloft during darkness that was illuminated by lighting flashes some distance behind it.
But I have had tornados pass over the house where I was during night time and damage houses on both sides of the one where I was. I have also had them pass horizontally within about a half-mile of me and it was raining so hard that I couldn't see more than a couple of hundred feet and the water on the ground was a couple of inches deep simply because it didn't have time to run off.
Sorry, 377.