Central Sierra Nevada

Problemi valanghivi

• 

  Storm Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

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

  Probabilità

  Likely

  Dimensione

  1–2

  Avalanche hazard is expected to vary significantly today from one location to another around the forecast area due to a very wide range in new snow accumulation both over the past 24 hours and during the day today. Consider avoiding avalanche terrain today, especially in locations with 6 or more inches of new snow, where slopes are filling in with wind drifted snow, where you encounter snow surface cracking, or see signs of recent avalanches. A firm crust at the old/new snow interface may act as an efficient bed surface and allow for some long running avalanches today.

  As new snow continues to accumulate today, expect to encounter areas of unstable snow in both wind exposed and wind protected terrain. Wind speeds are forecast to reach gale force/extreme speeds this afternoon. This increase in wind speeds is expected to increase the amount of wind loading that occurs in near treeline and below treeline areas as the day progresses. There is also the chance of some dry or wet loose snow avalanches today, where new snow slides on firm crust at the old/new snow interface.

  Before this storm, significant snowmelt occurred across the forecast area. Large areas of bare ground were present on all aspects below 7,500' to 8,000' as well as on southerly aspects at all elevations. Today's avalanche concerns are focused on locations where new snow has fallen on top of old snow. Where new snow has fallen on bare ground, avalanche concerns are minimal. In all areas, numerous hazards such as rocks, stumps, logs, etc are barely hidden under the recent new snow. Anticipate conditions similar to early season, where it is very easy to hit hard objects under the snow surface as you travel.