We never had until this weekend. We were using the pup as a guest room for one of my cousins high school graduation celebrations. Saturday night my wife, daughter and I were sleeping in our pup parked in the yard on my cousins farm in northwest Iowa. I estimate the winds were a sustained 30 to 40 miles an hour with higher gusts. The wind was hitting the pup square on the side with the bump out, do maximum canvas was catching the wind. At 5:00 am after nearly no sleep, my wife announced we were getting up and closing the camper before it got flipped. I was more concerned about the lift arms getting bent than actually flipping, but I didn't argue with her. We have pupped in storm conditions before, but nothing that matched this for strength and duration. There was little to no precipitation, just sustained high winds.