Difference between revisions of "Avalanche character definition table"

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Line 9: Line 9:
 
|class="Header"|Relative Size Potential
 
|class="Header"|Relative Size Potential
 
|-
 
|-
|'''Loose Dry'''
+
|class="Class"|Loose Dry
 
|Various<br/>(no cohesion)
 
|Various<br/>(no cohesion)
 
|None
 
|None
Line 17: Line 17:
 
|R1-2
 
|R1-2
 
|-
 
|-
|'''Loose Wet'''
+
|class="Class"|Loose Wet
 
|Various<br/>(no cohesion)
 
|Various<br/>(no cohesion)
 
|None
 
|None
Line 25: Line 25:
 
|R1-3
 
|R1-3
 
|-
 
|-
|'''Wind Slabs'''
+
|class="Class"|Wind Slabs
 
|DF, PP
 
|DF, PP
 
|4F-K<br/>wind transported
 
|4F-K<br/>wind transported
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|R1-3
 
|R1-3
 
|-
 
|-
|'''Storm Slabs'''
+
|class="Class"|Storm Slabs
 
|PP, DF
 
|PP, DF
 
|F-P<br/>Soft-stiff
 
|F-P<br/>Soft-stiff
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|R1-4
 
|R1-4
 
|-
 
|-
|'''Wet Slabs'''
+
|class="Class"|Wet Slabs
 
|Various
 
|Various
 
|4F-P<br/>Wet grains
 
|4F-P<br/>Wet grains
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|R1-5 (climax)
 
|R1-5 (climax)
 
|-
 
|-
|'''Persistent Slabs'''
+
|class="Class"|Persistent Slabs
 
|PWLs such as SH, FC, CR, FC/CR combo
 
|PWLs such as SH, FC, CR, FC/CR combo
 
|4F-P<br/>Stiff-hard
 
|4F-P<br/>Stiff-hard
Line 57: Line 57:
 
|R2-4
 
|R2-4
 
|-
 
|-
|Deep Persistent Slabs'''
+
|class="Class"|Deep Persistent Slabs
 
|PWLs such as DH, FC, CR, FC/CR combo
 
|PWLs such as DH, FC, CR, FC/CR combo
 
|1F-K<br/>Hard
 
|1F-K<br/>Hard
Line 65: Line 65:
 
|R3-5 (climax)
 
|R3-5 (climax)
 
|-
 
|-
|'''Cornice'''
+
|class="Class"|Cornice
 
|~
 
|~
 
|~
 
|~
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|~
 
|~
 
|-
 
|-
|'''Comment'''
+
|class="Header"|Comment
 
|Typical failure plane
 
|Typical failure plane
 
|Typical kind of slab
 
|Typical kind of slab

Revision as of 15:22, 29 December 2013

Character Weak Layer / Interface Slab Property Persistence Weak Layer Location Propagation Potential Relative Size Potential
Loose Dry Various
(no cohesion)
None Hours/days Near the surface Down slope entertainment R1-2
Loose Wet Various
(no cohesion)
None Hours/days Any level Significant down slope entrainment R1-3
Wind Slabs DF, PP 4F-K
wind transported
Hours/days Upper pack Terrain features R1-3
Storm Slabs PP, DF F-P
Soft-stiff
Hours/days In or just below storm snow Path R1-4
Wet Slabs Various 4F-P
Wet grains
Hours/days Midpack to deep Path R1-5 (climax)
Persistent Slabs PWLs such as SH, FC, CR, FC/CR combo 4F-P
Stiff-hard
Weeks/months Upper to midpack Path to adjacent path R2-4
Deep Persistent Slabs PWLs such as DH, FC, CR, FC/CR combo 1F-K
Hard
Weeks/months Deep or basal Path to adjacent paths R3-5 (climax)
Cornice ~ ~ Months with short peaks ~ ~ ~
Comment Typical failure plane Typical kind of slab Typical duration of instability Relative to HS Typical expectation Typical range of size relative to path

|}