Created by Werner Munter
3x3 Table and Reduction Method are to be used together to obtain acceptable avalanche risk
Note: This system is not designed nor intended for use in the United States. It is presented as an example of the excellant work being done in Europe on avalanche hazard analysis. For further information on this method get the book.
|Avalanche Report, Weather forcast, Info. from locals, etc.||Use 1:25,000 Map, Guide books, Photos, Own knowledge||Who's coming with? Skill level? Equipment? Who's responsible?||Researchable information|
Visible area and route selection
|General snow conditions, Wind direction and loading, New snow amounts, Oddities, Visibility, Temperature||Check info you've previously received, I.e. Relief, slope angle, steepness, ski tracks, etc.., Are there existing ski tracks-how many and when made?||Who's in my group? Equipment and Transceivers with? Time plan for tour? Itinerary left with someone?||Observations before setting out|
Exact location of questionable slope
|Check new snow amounts, Visibility, Solar radiation, Assess possible slab potential, What's keeping the snow together?||What's above and below me?, Steepest part of slope, Near the ridge? Any wind pockets?||Tiredness, Discipline, Technique, Distance between each other, how wide of a track? Think!||Go or not to Go|
|Acceptable Risk =||<=1|
|Red. Factor x Red. Factor|
Do not use this system without more knowledge of avalanches
You're skiing with one other person in a new area with no visible tracks
|Avalanche Report is 4||Danger Potential = 16|
|Steepest Slope angle is 38 degrees||RF 2|
|Slope is in Northern Section||RF 2|
|Small group (2-4 persons)||RF 2|
|Acceptable Risk =||= 2|
|2 x 2 x 2=8|
Ideally the Acceptable Risk Factor will be less than 1.
Equal to 1 is questionable!