Saturday morning is the one that’ll be next level at Stowe.
Operations are usually curtailed to lower mountain lifts and/or Gondola. FourRunner Quad has shelter at Octagon at the top but I could see lower mountain lifts only and maybe Gondola as a viable option.
Wind hold threshold drops greatly too… any decent breeze and lift goes on hold as no one wants to come close to any issues. The amount of risk assumed in those conditions is near zero. Wind can also trip sensors from chairs rocking, even slightly as tolerances of those sensors is extremely small. Normally that’s no problem, a lift mechanic just goes and verifies haul rope placement and it takes <10 minutes. It’s not ideal but it’s a CPS (cable positioning system) fault that lifts at most ski areas can see a few times a day in some cases. However, in that type of cold, even a 6-min stop is a problem. So if there’s a chance, lift goes on hold. Wind hold tolerance goes way down.
Decisions likely made Thursday and Friday for any operational changes within the next 24 hours based on final forecasts.
Personally, I’d try Friday and definitely Sunday. Saturday is out unless it’s one run for the novelty of it.