Central Sierra Nevada

Problèmes avalancheux

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Possible

  Taille

  1

  Wind slab avalanches remain possible near treeline and above treeline mainly on NW-N-NE-E-SE aspects due to new snow and moderate to strong SW winds. Avalanche size up to D2 may occur.

  Identify the specific terrain features where unstable wind slabs may exist. Ridgetop areas below cornice features and wind pillows are the most suspect. Sensitivity to triggering is expected at stubborn today so don't let your guard down if you are not seeing much in the way of evidence of instability.

• 

  Loose Wet

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alpin
  • Limite forestière
  • Sous la limite forestière

  Probabilité

  Likely

  Taille

  1

  A loose wet avalanche problem is expected to continue today in most areas. Some of these loose wet avalanches may share some characteristics with storm slabs, especially in areas above the rain/snow line. This avalanche problem could occur on any aspect and may occur at upper elevations in addition to occurring at the mid and lower elevations. Avalanche size of D1 is expected with the isolated possibility of size D2.

  Expect trigger points at slope convexities and in steeper terrain. Use small test slopes to assess for this avalanche problem. Avoid complex terrain and long steep pitches where this instability is present. Downslope hazards such as cliffs and terrain traps could greatly magnify the consequences of being pushed around by a small avalanche.