Central Sierra Nevada

Problemas de aludes

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque

  Probabilidad

  Likely

  Tamaño

  2

  Strong to gale force SW/W winds with additional snow today will further wind slab development on NW-N-NE-E-SE-S aspects in near and above treeline terrain.  These wind slabs could be natural or human triggered and be well over 4 feet deep in size.  Avalanches associated with these wind slabs and/or large cornice failures could have severe consequences.

  Avoid steep wind loaded terrain and run out zones.  Do not travel below large cornices.  Look for blowing snow, cornice formation, and wind pillows as clues to where wind slabs are located.  Make a plan to avoid all steep wind loaded areas. 

• 

  Loose Dry

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque

  Probabilidad

  Likely

  Tamaño

  1

  Storm slabs will be likely on all aspects in near and below treeline terrain.  Storm snow totals are 2 to 3+ feet with additional snow forecasted for this morning.  Cold temperatures may slow the bonding process of this new storm snow.  Additional intense snowfall rates this morning may also add to instability.  Look for cracking around skis or any signs of cohesion of the new storm snow.  Avoid slopes that have signs of unstable snow.

• 

  Wet Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque

  Probabilidad

  Likely

  Tamaño

  1

  Continued cold temperatures with additional snow will make loose dry avalanches likely on slopes steeper than 35 degrees in wind protected areas.  Most loose dry avalanches will be in wind protected below treeline terrain but could also occur in other more exposed locations.  Terrain traps, such as rocks, trees, and gullies, would magnify the consequences of being caught in a small loose dry avalanche.