Central Sierra Nevada

Problemas de aludes

• 

  Loose Wet

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque

  Probabilidad

  Possible

  Tamaño

  1–2

  Warming temperatures, decreasing NE-E winds, and strong April sunshine will cause unstable wet snow to form as daytime warming occurs today.   Another 5 degrees of warming is expected today along with the recent NE-E winds decreasing to light with additional warming expected over the next few days.  Snow surface melt will spread to northerly aspects today and to higher elevations that have still been holding colder winter snow.  Roller balls and pinwheels will form in many locations today with larger wet loose avalanches possible as daytime warming occurs.

  Roller balls and pinwheels will be indicators that larger wet loose avalanches are becoming possible.  As the snow surface becomes deep and wet, it's time to move away from avalanche terrain or change aspects to where colder snow exists.  

• 

  Wind Slabs

  N

  NE

  E

  SE

  S

  SW

  W

  NW

  • Alta montaña
  • Límite del bosque
  • Bajo el límite del bosque

  Probabilidad

  Unlikely

  Tamaño

  1–2

  Recent NE-E winds have continued to transport snow yesterday and overnight in near and above treeline areas.  Winds have started to decrease in speed and are expected to be light later today.  These wind slabs that have formed are expected to gain strength today, but could still be problematic in some areas for backcountry users.  Larger wind slabs could exist in areas that received more snow during our last Thur/Fri storm.

  Look for signs of previous wind transport like snow surface scouring, recently formed wind pillows, or newer cornice formation.  These NE-E winds could cross load slopes with recent avalanches reported mid slope.  Any cracking in newly deposited snow could indicate unstable wind slab.  Move around any suspect areas of concern.