Yesterday, I opened up the high tunnel and saw that all the 2x4 rafter supports had fallen over, after the snow had slid off the roof, I needed to use additional 1 1/2" spacers on all of them to get them in place again.  It was interesting to learn that the snow had caused an inch and a half sag in the roof, that is quite a bit more than I was guessing.

The weather forecasters are calling for another storm to roll in later today, with more snow and wind.  I have the rafter bracing up and the doors tied down, so hopefully we won't have the same problems that we encountered earlier this year.