Difference between revisions of "Hazard rating definition table"

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(North American Public Avalanche Danger Scale)
(Avalanche Hazard Rating Scale)
 
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==Definition==
 
==Definition==
'''Avalanche hazard'''; '''avalanche danger''' is the potential for an avalanche(s) to cause damage to something of value. It is a function of the likelihood of triggering and the destructive size of the avalanche(s). It implies the potential to affect people, facilities or things of value, but does not incorporate vulnerability or exposure to avalanches. Avalanche hazard is commonly expressed using relative terms such as high, moderate and low.
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'''Avalanche hazard'''; '''avalanche danger''' is the potential for an avalanche(s) to cause damage to something of value. It is a function of the likelihood of triggering and the destructive size of the avalanche(s). It implies the potential to affect people, facilities or things of value, but does not incorporate vulnerability or exposure to avalanches.
  
==North American Public Avalanche Danger Scale==
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==Avalanche Hazard Rating Scale==
 
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
 
Avalanche danger is determined by the likelihood, size and distribution of avalanches.
  
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|-
 
|-
 
|class="Header"|Danger Level
 
|class="Header"|Danger Level
|class="Header"|Likelihood of Avalanches
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|class="Header"|Likelihood of Triggering
|class="Header"|Avalanche Size and Distribution
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|class="Header"|Size and Distribution
 
|-
 
|-
 
|class="Class" style="background-color:#231F20; color:#ffffff;"|5
 
|class="Class" style="background-color:#231F20; color:#ffffff;"|5
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|-
 
|-
 
|class="Class" style="background-color:#F7941E;"|3
 
|class="Class" style="background-color:#F7941E;"|3
|Natural avalanche possible; human-triggered avalanches likely
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|Natural avalanches possible; artificially triggered avalanches likely.
|Small avalanches in many areas; or large avalanche in specific areas; or very large avalanches in isolated areas.
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|< Size 2 avalanches are widespread; or size 2-3 avalanches in specific areas; or > size 3 avalanches in isolated areas.
 
|-
 
|-
 
|class="Class" style="background-color:#FFF200;"|2
 
|class="Class" style="background-color:#FFF200;"|2
|Natural avalanche unlikely; human-triggered avalanches possible
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|Natural avalanches unlikely; artificially triggered avalanches possible.
|Small avalanches in specific areas; or large avalanches in isolated areas
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|< Size 2 avalanches in specific areas; or size 2-3 avalanches in isolated areas.
 
|-
 
|-
 
|class="Class" style="background-color:#50B848;"|1
 
|class="Class" style="background-color:#50B848;"|1
|Natural and human-triggered avalanche unlikely.
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|Natural and artificially triggered avalanches unlikely.
|Small avalanches in isolated areas or extreme terrain.
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|< Size 2 avalanches in isolated areas or extreme terrain.
 
|}
 
|}
  

Latest revision as of 14:02, 25 January 2017

Definition

Avalanche hazard; avalanche danger is the potential for an avalanche(s) to cause damage to something of value. It is a function of the likelihood of triggering and the destructive size of the avalanche(s). It implies the potential to affect people, facilities or things of value, but does not incorporate vulnerability or exposure to avalanches.

Avalanche Hazard Rating Scale

Avalanche danger is determined by the likelihood, size and distribution of avalanches.

Danger Level Likelihood of Triggering Size and Distribution
5 Natural and artificially triggered avalanches almost certain. > Size 3 avalanches are widespread.
4 Natural avalanches likely; artificially triggered avalanches very likely. Size 2-3 avalanches are widespread; or > size 3 avalanches in specific areas.
3 Natural avalanches possible; artificially triggered avalanches likely. < Size 2 avalanches are widespread; or size 2-3 avalanches in specific areas; or > size 3 avalanches in isolated areas.
2 Natural avalanches unlikely; artificially triggered avalanches possible. < Size 2 avalanches in specific areas; or size 2-3 avalanches in isolated areas.
1 Natural and artificially triggered avalanches unlikely. < Size 2 avalanches in isolated areas or extreme terrain.


Source: https://c.ymcdn.com/sites/www.avalancheassociation.ca/resource/resmgr/InfoEx/IAG_-_Hazard_Rating_&_Guidan.pdf

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