Central Sierra Nevada

Problemi valanghivi

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta quota
  • Limite del bosco
  • Sotto il limite del bosco

  Probabilità

  Possible

  Dimensione

  1–2

  Winds out of the W gradually increased in speed yesterday, peaking at strong to gale force last night. Minor amounts of blowing and drifting snow from the past 24 hours combined with the possibility of a couple of inches of new snow and NW winds today will drive concerns for small areas of unstable snow on N-NE-E-SE-S-SW aspects. In most near treeline and above treeline areas where drifting snow has deposited, today's wind slabs will be small at size D1. In any areas where new snowfall amounts reach the upper end of forecast totals today, cohesive wind slabs approaching size D2 could pose a more substantial threat to backcountry travelers.

  Identify the slopes where blowing and drifting snow is accumulating and creating the possibility of unstable snow. Areas below ridgetop cornice features and along the sides of cross-loaded gully features have the greatest chance of holding unstable snow today. Evaluate these areas carefully and if in doubt, avoid them.