Jasper

Problèmes avalancheux

• 

  Persistent Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Possible

  Taille

  2–4

  The buried surface hoar layer is a concern in areas that have not avalanched already. Solar effect is a likely trigger in the afternoon directly on solar terrain or indirectly by causing cornice failure onto shaded lee slopes.
• 

  Storm Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Possible

  Taille

  1–3

  Primarily southwest moderate alpine winds continue to form slabs and large cornices on lee aspects, but previous variable winds have also reverse loaded some features. Smaller windslab avalanches may step down to deeper instabilities.
• 

  Loose Wet

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Possible - Likely

  Taille

  1–2

  Surface snow is responding to strong solar radiation that happens in March/April. Ice climbers should also be wary of large pillows of snow still above routes on solar aspects. Even thick surface crusts will break down with sustained solar energy.