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Eastern Sierra Avalanche Center

Professional Observation

       

Basic Information

Observation Details

Observation Date:
April 10, 2022 - April 10, 2022
Submitted:
April 10, 2022
Observer:
Geoff Unger | Key Observer
Zone or Region:
Mammoth Lakes
Location:
Horseshoe Lake Weather Observations

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
None Experienced
Collapsing? 
None Experienced

Snow Stability

Stability Rating: 
Very Good
Confidence in Rating: 
High
Stability Trend: 
Steady

Key Points

In the field again today with a core group of AIARE 1 students who were primed for adventure.   The snowpack this season has been challenging and it has only gotten more difficult to find good skiing in our traditional backcountry locations.  Thin and variable coverage, sticky snow and debris on the snow surface are all complicating factors.

Here is a summary of some key points from today.

  • Continued wind and thin cloud cover kept snow surfaces cooler for a longer period of time today.
  • East aspects did not soften except for the steeper areas by 11:00 AM near ridgelines
  • In sheltered SE facing terrain the surfaces did soften in more sheltered areas at mid and lower elevations, but were also sticky skiing before noon.
  • Coverage and connected snow panels are making it hard to ski continuous runs above Horseshoe Lake, especially on southerly aspects.
  • Lower down in the Lakes Basin flat terrain and roadways are beginning to melt out with bare patches showing through in many places.

Be aware that cooler temperatures, cloud cover and new snow fall will changes these conditions dramatically in the next 48 hours.  New snow will hide bare patches, thinly covered obstacles and uneven surfaces.  In addition, the old snow surface will become the bed surfaces for future avalanches when we get new snow.

Have a great spring touring season and please continue to post your observations to the following link:

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Weather Summary

Cloud Cover:
Mostly Cloudy
Temperature:
3.5 degrees C
Wind:
Moderate , SW

20220410

Field Weather Observation:

Location Horseshoe Lake

Time 11:50

Elevation 8990

Aspect S

Sky -BKN

Tair/surf 5.5/-0.5

Precip NO

Wind L -> SW gusting M

Blow Snow None

Surface Form/Size MFcr 1.0 mm

HST 0cm

HS 27

Pen Boot/Pen Ski 3cm/1cm

Field Weather Observation 2:

Location Horseshoe Lake Aprons

Time 1240

Elevation 9490

Aspect NE

Sky -BKN

Tair/surf 3.5/-1.5

Precip NO

Wind L -> W

Blow Snow None

Surface Form/Size MFcr 1.0 mm

HST 0cm

HS ?

Pen Boot/Pen Ski 5cm/2cm

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