Jasper

Avalanche problems

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpine
  • Treeline
  • Below treeline

  Likelihood

  Possible - Likely

  Size

  1–3

  Moderate to Strong Northerly winds have developed extensive wind slab on lee slopes and have cross loaded gulley features. A stiff wind slab is present on almost all slopes. There may have enough mass in these slabs to release the basal facets.
• 

  Cornices

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpine
  • Treeline
  • Below treeline

  Likelihood

  Likely - Very Likely

  Size

  2–4

  Cornices have developed above wind-loaded features. Several avalanches (size 2 to 3) have been triggered by both human-caused and natural cornice fall. These large loads have released slopes down to the basal facets in the alpine.
• 

  Deep Persistent Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpine
  • Treeline
  • Below treeline

  Likelihood

  Possible

  Size

  2–4

  Large loads (large cornice fall) have been able to trigger this weakness recently on fatter wind-loaded slopes in the alpine.