Mark, that’s funny that you and I had the exact same weather when I was up in Alaska last week. Must have been hunting near each other.
My niak survived our 70-80 MPH gusts with sustained winds over 40mph one night, but not without some major flexure. Also survived about 6” of snow one night, and hard sleet another night, but the elements certainly stressed the tent. There were times I was kicking myself for not packing a 4-season tent. It was September In Alaska after all. I probably got lucky with mine holding up, but it did and I was very grateful for it.