tarp use in high winds

I've had tarps hit by high (40-50 mph) winds and not had problems–but if I'm expecting weather like that, I take a tent. An extra pound or two is a pretty cheap insurance policy, IMHO. I'd check out a tunnel tent ala Warmlite, maybe Hilleberg… maybe Roger would sew up one of his supertents for you? I'll be honest: my favorite shelter for bad weather is still an older Moss tent. It weighs seven pounds–I have to cut my whisky ration (and more) to carry it, but the thing is bombproof! (I realize it's not what you're looking for, just sharing.)

I don't actually think the issue is about whether or not a tarp can handle high winds. Pitching and staking it properly will make it as stable as a tent, with probably more flexibility since it can be pitched very low if need be. In a tent you are stuck with whatever profile it is designed with. From a survival point of view, you could just wrap yourself and sleeping bag in the tarp if you couldn't find a decent place to pitch it.

For me (not sure about Peter), the issue is one of comfort and convenience. Lying out a storm flat on my back with a tarp flapping centimetres from my nose is just not something I want to face if I have a choice. I like to sit up and read, play cards or sudoku, etc…