Jasper

Problèmes avalancheux

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Likely

  Taille

  1–3

  Moderate NW winds have begun to redistribute the recent 50 cm of storm snow into wind slabs on alpine and open treeline slopes. These slabs will be reactive. Avoid wind loaded slopes.
• 

  Persistent Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Possible - Likely

  Taille

  2–4

  Open slopes on Northeast to South aspects have buried slabs sitting on surface hoar. On southerly aspects, the surface hoar formed on a sun crust, increasing the possibility of remote triggering and wide propagations.
• 

  Storm Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Very Likely

  Taille

  2–4

  50 cm of snow fell during the latest storm. A widespread avalanche cycle resulted. This new snow is sitting on a well developed surface hoar layer. This instability will be a concern for a long time! Conservative decision making is essential.