Years ago think it was 86 or something we had a few weeks of snow on and off and the wind was right for drifting in places out the back of ours it had drifted up against a 100 yd fence about 4 ft deep and packed it self don me dad cut blocks out with a saw n spade and made me and my bro one it stood for 3 weeks after the snow had gone school kids tried knocking it down but the blocks were nearly 18 inch thick and frozen solid lol good little shelter and loads of fun . Not a flake here yet forecast for about 9 ish I think right rough the night and all day tomorrow but we shall see lol.