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In some situations, a tent might prove to be a drawback--if snow is falling at the rate of 1 foot per hour, then wouldn't the tent be buried, and eventually collapse, after 10 hours or so (at least most of the tents discussed on this site)? That rate of snowfall doesn't, I think, usually last for more than a day, and, at least on the West Coast, is usually accompanied by temperatures above 10 deg., or warmer, unless one is at altitude--in which case the rate of deposition would be substantially less.
So if one dressed warmly, and kept moving in a circumscribed area--around and in the lee of a tree, say--one could wait until the rate of deposition diminished, then set up ones tent. (This assumes one moves slowly, not perspiring, and has warm layers to wear).
More dangerous generally, I think, is a lower rate of snowfall accompanied by very high winds and low temps, where a shovel, or snow claw, would be useful for digging a trench.
The main thing, I think, is to stay calm, and the best way to stay calm is to be confident of ones knowledge/experience, which is one of the points of the article.
In high winds/great cold/heavy snowfall, a good snow cave, which can be built with a bear claw if one has time and/or skill, has many advantages over a tent.
The Donner party was immobilized by snow fall and their lack of knowledge, but died slowly, of starvation, not primarily by freezing. (48 of the original party of 87 survived, according to Wikipedia).
Edited by swimjay on 10/30/2012 15:30:09 MDT.
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