Provo

Problemi valanghivi

• 

  Storm Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

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

  Probabilità

  Possible

  Dimensione

  2

  Human triggered point release and new snow avalanches remain possible on all aspects at upper elevations and northwest through east-facing aspects at mid-elevations. With a wide variety of surface conditions before this most recent storm, these avalanches have a variety of weak interfaces to break on. This new snow instability will be most suspect on upper elevation and north-facing terrain that has been preserved by the cool temps and lack of winds.

  The Fine Print:

  • If winds increase into the afternoon, at the uppermost elevations shallow soft slabs of wind drifted snow could begin to form. Look for signs of wind loading and avoid that terrain.
  • If we see more sun than expected, the new storm snow will become more active on the steepest sunlit slopes.

  These slides are most problematic in steep, sustain terrain where the sluff and storm snow debris may pile up deeply or above-exposed rocky terrain that being knocked off your feet isn't an option.

  There's generally little mystery with these types of avalanches: they break at your feet or sled and respond to cornice drops and ski cuts. Keep an eye on your partners; carry and know how to use your rescue gear.

  Danger Trend: Steady to Decreasing

• 

  Persistent Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

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

  Probabilità

  Unlikely

  Dimensione

  3

  We still have a potentially unstable snow structure of a strong slab over a very persistent weak layer of faceted snow near the ground on mid and upper elevation northwest through east facing terrain.

  Overall this layer continues to present itself as dormant, giving no signs of avalanche activity for over a week, but it is not gone nor is it forgotten. Recent wind and snow has added a touch more stress to these basal weaknesses, but in isolated areas. While we are getting closer to seeing the absolute dormancy of this layer, we need more time.

  Yesterday Mark and I targeted the Shale Shot area off the Park City Ridgeline where we found obvious facets at the ground and we were able to get propagation only with very hard hits of our shovel. This area best represents the most suspect slopes for this persistent weak layer, very rocky places or places with a thin snowpack (less than a ski pole in depth). While out traveling look for signs of a shallow snowpack by probing the depth with your ski pole or probe.

  If you choose to enter the terrain where this avalanche problem exists, look at the terrain below you and consider the consequences of triggering one of these large avalanches.

  Below is a photo representing the soft and shallow snowpack on top of the weak facets on the ground found in more suspect terrain of the Central Wasatch PC: Champion

  Danger Trend: Steady to Decreasing

  When will this layer go away?

  Info about this layer and where it exists