Winds - I am in an urban area with lots of buildings and trees around that buffer the wind. Get the odd gust to 30 - 40 MPH. My experience with this design years ago that it spills the wind well, and yields as it will flex. Needs to be anchored well to the ground.
Snow - Our snow load is light in recent years. (2 feet or so) Snow is mostly dry and will shed from this structure. I'm not sure about a heavy, wet spring snow and would remove it if it sticks.
As to the question from Ronnwil about rot. It is ordinary wood and it will rot. I have treated the wood with a salt brine and will put an impervious barrier under the base. Hope to get 8-10 years out of it. More durable wood such as western red cedar and redwood are cost prohibitave away from the coast in Canada. I am anal about treated woods.
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