Ski Touring & Risk Space
1.0 CHOOSE YOUR PATH
In recent years, interest in nature’s wilderness and untracked powder fields. When people and snow-covered mountains meet, the potential for avalanches exists. Every skier should make it their business to understand avalanche phenomena.
During a ski tour, the danger of an avalanche is always present. Reassessing risk depends on your knowledge and on being cautious when assessing the risk before each tour.
Assessment of avalanches would be assessed from observing the current terrain and snowpack, taking into consideration the past and present weather, as well as slope stability tests. Ask yourself these questions: What information do I have that makes me think this slope is stable? What is the likely outcome for our group should the slope avalanche?
In this interactive guide you'll obtain a better understanding of the statistics of avalanches, best practices for riders in the backcountry, the threee ssentials for touring, how to assess snow stability, a snow stability checklist, learn key points in avalanche awareness, additional resources to know about, avalanche accidents, what to do and how to search,plus immediate response to victims that have been buried.
2.0 STATISTICS
& BEST PRACTICE
First, the good news is that, if the victim is alive after the initial impact, they have an 80% chance of survival if dug out in the first 12 minutes. But after that the news is not so good. It is thought that unless recovery is made within 30 minutes, an avalanche victim’s chances of survival are less than 50/50. Out of all skiers buried by an avalanche, only 4 out of 10 survive.
Over a recent period 1347 people were known to of survived partial or complete burial by avalanche. Of these 39% dug themselves out.
Were dug out by survivors on the scene.
Were recovered by rescue teams - but most of these were near ski resorts.
In that same period close to 1000 died - two-thirds by suffocation. The fact is that less than one-third of those buried survive, and this doesn’t refer to deep burial. For those buried under less than 50cm of snow the survival rate is around 45%. At more than 2 metres only 1% survive, and below 3 metres…? not available
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BEST PRACTICE
An initiation or refresher course in snow safety at the beginning of each season is therefore a wise reflex for all types of independent mountaineers. Off-piste freeriders, snowshoe hikers, winter alpinists and touring skiers – we all want to descend in one piece at the end of the day.
Courses in avalanche science and first aid come in many shapes and sizes. This winter I myself participated in a snow safety course in the mountains in the broadest sense of the word. We discussed theory in the morning and put our. knowledge into practice throughout the afternoon. The main themes covered were first aid, avalanche science and general planning. We under took numerous avalanche simulations with a variation of victims numbers and rescuers, we dug igloos to keep our ‘victims’ warm, fake bleeding was planted at the scene to simulate trauma, together we learnt and practiced resuscitation techniques on dolls and constructed splints for broken arms and legs.
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THE HUMAN FACTOR
Many people automatically think of snow safety as avalanches. However, there are plenty of other factors to consider before imposing the risers or buckling your bones at the top of the slope.
These factors are also often human. 'Heuristics' is the collective term for human mental shortcuts that influence decisions. Of these, peer pressure is the most well-known, but also individual expectations, previous expectations and uncertainty or excessive enthusiasm. For example, people who only have a few days of skiing vacation often take risks that they would not take if they had more time. Also, familiar descents are often mistakenly considered safe and people stick to a predetermined plan despite indications that this would be better adjusted throughout the day.
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AVALANCHE DANGER
When estimating avalanche danger, you are looking at numerous variables: gradient of the slope, recent snowfall, presence of trees, quality of the existing snow, wind direction... With this all in mind, Avalanche danger can never be underestimated. This is why our first port of call is to always consult the local avalanche report in advance, in which local experts assign a score between 1 and 5 to estimate the probability of an avalanche.
To put this scale to task, its worth remembering that most accidents happen in areas with a score of 2 and 3. And not 4 or 5, as many people would come to expect. Avalanche reports contain a lot of information about how this score has been arrived at. Advanced students would do well to delve into the details. To learn how to work with their transceiver (or ‘beeper’ as it is often called in North America), a probe and snow shovel. Bigger ski resorts also offer 'Avalanche Park', where you can sharpen your skills and cooperation in group in complete safety.
On tour, assessment of avalanche danger should be gained from gathering observed facts about the terrain, the snowpack, past and present weather, and from slope stability tests.
Ask yourself these questions:
• What information do I have that makes me think this slope is stable?
• What is the likely outcome for our group should the slope avalanche?
• Do we have an agreed emergency procedure in place if it does?
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ADVANCED FIRST AID
For those that already have a first aid certification in their salopettes, it’s reaffirming to know that these foundational principles are also valid in the high mountains. But circumstances in this challenging environment can be much trickier.
This is why simulating practical applications is of the greatest importance to ensure you are prepared to act quickly if and when things go wrong. The first step is to save a life (bleeding, consciousness, breathing), simultaneously calling for support from rescue services as soon as is physically possible, ensuring that everyone within your ski touring group has the local emergency support number to hand at all times.
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PREPARE TO FAIL
Don't be too ambitious when you take your first steps off the beaten slopes. Plan manageable tours and know your own limits. Deep in to inhospitable terrain is not the place to test it out. In our digital age, we are blessed with numerous websites where you can find GPS files for detailed tours including hut-to-hut overnight refuge stops. Useful tools such as the Fatmap app allow you to project the slope on a 3D map to get a better view of the terrain from the comfort of your sofa.
Also websites of course providers and reputable brands are a good source of information. A golden tip is, for example, the Snow Guide Book in the online Safety Academy on the Ortovox website. Discuss your trip in advance with all group members, don't forget to talk about possible options to drop out and plan moments throughout the day when the plans can change. Big dreams are made with small steps! Before you know it, you'll be on your way from cabin to cabin for a multi-day winter tour.
3.0
THE THREE
ESSENTIALS
TRANSCEIVER
SNOW SHOVEL
PROBE
4.0
SNOW
RELIABILITY CHECKLIST
ASSESSING SNOW STABILITY
There is a lot you can do to assess snow stability before you go on tour. Snowpack is the result of past snowfall and weather conditions, and you need this information to understand how it has built up. Weather reports, avalanche bulletins and websites provide an often detailed picture of what conditions have been and are now like on the hill. Tourist Offices and Guide Bureaus, as well as knowledgeable locals, can all provide additional information.
Once on tour you need to evaluate snow stability constantly because the slope aspect, altitude and conditions are always changing. To some degree ski mountaineers gain a feel for slope angle, snow and conditions from experience over time. It’s always useful to have a procedure when evaluating snow stability. Aim to gather targeted information that will help you build an informed picture. Eliminate unessential information and go straight for the bull’s-eye.
This is a checklist for assessing snow stability similar to those used by British mountain guides and avalanche professionals around the world. I’m always surprised by how easy it is to overlook obvious signs of both danger and stability. The checklist is useful as an aide-memoire to help systematically observe, test and record pertinent information and so build up a profile of snow stability at a particular time and place. This information provides a more complete picture when the time comes to make a judgement about avalanche danger.
Evaluation Factors
Record Information
Influence/trend Stable
Influence/trend Unstable
Slope angle
Snow depth
Past Avalanche Activity
Current Avalanche Activity
Shear tests
Snowpack Structure
Snow Temperature
Precipitation
Wind
Effect of past winds
Surface Penetration
Air Temperature
Solar Radiation
Snow Settlement
Humidity
Weather Forecast
Avalanche Forecast
Stability Rating (Based on the above)