rob jackson – Member
Are snow caves not really dangerous?
You’d be better asking all the people who have dug one to survive a night out in blizzard conditions!
The one we built yesterday was big enough for two. Once you have built it you smooth the walls down and let your body heat and moisture form an ice glaze. This increases the insulating properties. Inside the cave yesterday it was warm enough to take your hat and gloves off. Out in the wind it froze the snow to my beard and merino wool hat as you can see in the pics. They are therefore an excellent way of getting out of the elements and into a survivable zero to plus a few degrees. I guestimate yesterday temperature up on the moor was -3 or -4, then add another -15 to that for the strong wind that was causing a drift that size in the first place.
Basically you need to be aware of the snow above the cave, and if you are going to overnight in one you need to keep a ski or trekking pole at the entrance to give you a means of unblocking periodically.
Many years ago as a cadet I bivvied at 35000 feet in a Scottish corrie. We tamped the snow down to pitch the tents about four feet below the surface of the snow, and built a snow wall to deflect the wind that was whipping up as we pitched camp. It blew a gale that night, and we were all buried by morning. Needless to say, we all survived!