Eugene said
"I need it to be able to survive high winds while keeping out enough gusts for me to stay warm inside."

dude, a tarp tent cannot survive high winds along the PCT, eek and it will not help keep you warm. frown Your warmth needs to come from carrying a realistic sleeping bag for the conditions and a shelter that won't be destroyed or blown away by winds. Wet snow is not a pleasant thing when its piled on top of you because your tarp blew away, shredded, or simply collapsed. I suggest that you get some more snow experience elsewhere in a safer place than up on the PCT. From your post it just does not sound like you are experienced enough yet to attempt what you suggest, no offence. smile
Jim crazy
These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.