I've =NEVER= seen an active greenhouse under snow because heat has a tremendous ability to melt snow. Now, if you didn't heat your greenhouse, because unless you're using geothermal or some other heating source you don't have to pump cash into or add logs too, then it probably wouldn't work well for growing things during the very dead of winter. Of course this year I never had to use my roof rake, because I never got enough snow on my roof to need to do that. Your mileage may vary. Because greenhouses are designed to get hot, even if you didn't give them an external source of heat, I doubt much snow would stay on their roofs, though actually GETTING to your green house would be more of an issue.
Geothermal is of course, rather expensive in New Hampshire because they don't call this the granite state for nothing. Drilling is expensive here, but if you have a large enough tract of land, and a trencher or backhoe, you could probably do a horizontal installation, rather than drilling wells. Either way, it's time or money.
I saw something that suggested the drought in California is only the tip of the sand dune. That over the rest of the 21st century they could hit 2 or 3 even worse droughts. Now California has a large mass of water next to it, and while desalination is expensive in both financial and environmental costs, it is at least an option. What does Arizona have going for it if the rain does not fall from the sky?
Given the choice between too much, or too little, I'll take too much, though we have had such wet summers here that crops were impacted negatively.
Measuring when a man made pile of snow melts is a bogus measurement. Those snow piles are compacted, and piled as high as they can make them. When we get the right temperature fluctuations, they eventually turn into giant blocks of ice. This winter the temperatures held at such a state that you could EASILY shovel every flake of snow that fell until about mid February. Each storm dropped nice fluffy snow on the previous pile of snow. It was kinda weird, I have to admit. Those aforementioned snow piles of course as the spring comes on melt and freeze and melt and freeze, the greater the mass, the longer it takes to get rid of them. And Boston is a city lacking a lot of places to put snow, as they're not allowed to do what they used to do in the previous century, and dump it all in the Charles river. So as I said, bogus measurement.
The snow in my yard was gone by April if my memory serves me correctly.
You speak of long term trends and what may or may not happen. What has happened is the state has grown out of control. Sure Colorado lets anyone smoke weed, but nobody can legally put an empty bucket on their deck to collect rainwater.
No state in this union is perfect, but when the idea of the FSP was created Jason made certain assumptions about maximum population and the number of activists that would be required to make a positive influence on that population. While nobody involved on the ground here thinks we need 20,000 people most agree that a small population state was a good idea. Then other factors were looked at and debated.
Many years ago I had to go to Jackson Hole, Wyoming to install some data storage equipment. After I was done, I had some free time before I needed to head home and thought I might see about visiting some of the free state wyoming people. Well the contingent of free state Wyoming people at that time were mostly located in eastern Wyoming, over 7 hours driving time from Jackson. In New Hampshire virtually everywhere in the state is within 4 hours of everywhere else, and that's talking south to north. East to west is about 2 hours, depending on how far south you are. Practically speaking most places you're likely to live are no more than 3 hours from most places you're likely to want to go, and usually a lot less.
As I said, nowhere is perfect, but the voters at the time decided that New Hampshire had the best structure in place to work towards creating a society in which the maximum role of civil government is the protection of life, liberty and property. Over 1700 people have moved to the state in advance of reaching 20,000 signers, and dozens have been elected as state representatives. Usually just over a dozen hold that office at any one time (out of 400 total reps). Dozens, perhaps hundreds more have held town and city level offices. Other help create charities, engage in civil disobedience, participate in agorism, or whatever else they feel like doing to fulfill their statement of intent.
Now maybe the winter of 2016 will herald a new ice age and the snow won't melt until 2237. I'm not going to live my life worried about that sort of thing. If the grain belts fail, we do have technology to help feed us. Perhaps the government would stop paying people to not grow food, or stop subsidizing people to grow fuel instead of food. In fact, if the government got out of the way, I'm sure we could solve almost any problem.
Right now the government doesn't seem to way to get out of our way or its own way. Given that some of us believe we have a better chance by moving to New Hampshire and working together here. No matter where in the state we live, we're not too far from friends if we want to go to them or they want to come to us, or we want to meet somewhere in the middle.
Many people say the best thing about this movement is being in a group of people where your political ideas are not the weirdest.