Archive for the '07 Avalanche Avoidance' Category

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Avalanche Avoidance – Part III

Snow is stable roughly 95% of the time, but the remaining 5% is often the most desirable time to go skiing, like right after a big phat powder dump on a bluebird day.  Avalanche safety takes years of practice and as much as anything else, it is about developing avalanche eyes for what will slide, how far it will go and what are your options.  Ernie Buehler, a guide at the prestigious Canadian Mountain Holidays heliskiing operation has guided thousands of clients through millions of feet of notoriously tricky terrain for over 30 years and only been caught in one slide. How? Patience, responsible terrain selection and more patience still.  You have to want to avoid avalanches. 

Taking the morale high ground on avalanches by staying above their starting zone.  Thunder Mountain, Alaska Range, AK. 2003
Taking the morale high ground on avalanches by staying above their starting zone. Thunder Mountain, Alaska Range, AK. 2003

Between new safety technology and changes in attitudes, people are venturing into more committing avalanche terrain than ever before.  In times past, avalanche education was as simple as telling skiers to stay out of avalanche terrain, which is still taught in parts of the world.  It’s not a bad idea, but also not reality.  What was once considered insane terrain is now skied before breakfast without a second thought.  Skiers are becoming much more educated about avalanche danger, but at the same time they are cutting the safety margins down to the bare minimums.

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Avalanche Avoidance – Part II

Avalanche safety is a blend of art and science.  The artful part has to do with route finding and safe travel protocol, while the science aspect is concerned with testing the snowpack and tracking the weather.  Both elements are important and ski mountaineers mix and match them according to their own personal interests.

Professional Avalanche Forecaster, Bruce Tremper, applying some science to the snowpack.
Professional Avalanche Forecaster, Bruce Tremper, applying some science to the snowpack.

The science aspect of avalanche safety is akin to a college degree; something that is good to have, vital to understand, an excellent background and looks good on your resume, but the information is usually forgotten as soon as you graduate unless you go into avalanche academia.  Sticking to a ridgeline for an ascent is a far more practical way to avoid avalanches than calculating (T10-Tgnd) / (HS/10) =cTG.  As Bruce Tremper says in his excellent book “Staying Alive in Avalanche Terrain” there are many avalanche pros who would be “hard-pressed to tell a facet from a faucet, but they have nevertheless managed to develop a nearly infallible feel for the snow.”

…continued on Monday
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Avalanche Avoidance – Part I

You know what an avalanche is, huh?  It’s what’ll kill ya.

Gabe – Alta Ski Patrol

The avalanche path and the skier can never truly be friends.  In the backcountry, the skier wants what the avalanche path has (steep & deep) but the avalanche  could care less about the skier and always has the upper hand.  It’s an uneasy relationship at best and it is important not to get too cozy with slide paths as they have a temperament of their own and should never be trusted.

An early morning avalanche.  At the time, avoiding getting swept down in the debris seemed like it was based on skill.  18 years later, I think it had as much to do with luck as anything!  Photo by Doug Hall.
An early morning avalanche. At the time, avoiding getting swept down in the debris seemed like it was based on skill. 18 years later, I think it had as much to do with luck as anything! Photo by Doug Hall.

As a base concept, avalanches are best avoided to begin with as it’s rare to win a fight with even a small one.   If you find yourself thinking that a slope will probably slide, but that it won’t go very big, or you’ll be able to outrun it, that is a classic Red Light.  Once you are caught, all bets are off and anything can happen, including terrain traps, shallow burials and stepping down.  Avalanches are difficult to accurately forecast in advance, yet painfully obvious in retrospect.  For this reason, I prefer to focus on avalanche avoidance instead of prediction.  Assume slopes are guilty until proven innocent and always watch your backside.

continued tomorrow…

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