Ogden

Lawinenprobleme

• 

  Loose Wet

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Hochgebirge
  • Waldgrenze
  • Unterhalb der Waldgrenze

  Wahrscheinlichkeit

  Almost Certain

  Größe

  2

  The cold dry storm snow will turn on a dime today with the direct sun and skyrocketing temperatures and all the recent storm snow will run fast and far on the underlying crusts on the east, then south, then west facing slopes. Wet loose and (possibly) wet slab avalanches are certain on these sunlit slopes. Cement-like debris piles will be impressive under the steepest, most sustained terrain. Low to mid elevation shady slopes will also become unstable with the dramatic warming and may gouge into unconsolidated wet grains below (creating a much larger avalanche).

  Initial signs of instability include rollerballs, pinwheels, initially small sluffs. These are signs to seek colder aspects or low angle terrain.

  Timing is key. Plan your descents and exits accordingly.

• 

  Storm Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Hochgebirge
  • Waldgrenze
  • Unterhalb der Waldgrenze

  Wahrscheinlichkeit

  Possible

  Größe

  1

  Yesterday's storm snow instability peaked in the mid-morning hours, but one may still trigger a lingering soft slab avalanche up to a foot deep along the highest elevation northerly aspects. By the afternoon, most of these will have settled out entirely.

  CORNICES will become more sensitive as they sag in the sweltering heat. These have become enormous this winter and destruction from cornice failure has been well observed and documented this week. INFO.

  ROOF-ALANCHES are also expected with the sun and temperatures. PLEASE spread the word to other homeowners in the mountains. Roof-alanche fatalities have occurred in the West this year with many close calls.

• 

  Persistent Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Hochgebirge
  • Waldgrenze
  • Unterhalb der Waldgrenze

  Wahrscheinlichkeit

  Possible

  Größe

  2

  Buried and preserved surface hoar and faceted, recrystallized snow - now 12-18" deep - may still be triggered in the shady terrain of the mid and upper elevations. We found it active and collapsing on Saturday above about 7500' with avalanches triggered on this layering on Friday. This layering should be viewed as suspect until proven otherwise and slopes should be assessed individually with conservative decision making always a good call.

  Fortunately, this layering is easy to recognize and test with both compression and extended column tests. Collapsing and cracking are sure signs of instability. These may be triggered remotely.