Observations

Lunch Rocks

January 22, 2021 at 1:00 PM
Name: Ryan Lewthwaite| MWAC
Location: Lunch Rocks

On a southeast aspect around 4400′ near the “Lunch Rocks” we observed the snowpack and surrounding avalanche terrain above. We noticed natural dry loose snow and wind slab avalanches had occurred on east aspects over 35 degrees. Snow was accumulating at a rate of S1 to S2 for much of the day. The debris was piled at the toe of slopes in Tuckermans Ravine Headwall, Chute, Open Book, & Left Gully. As we watched skiers cautiously descend the terrain it was obvious that sluffing of the most recent surface snow was a factor. Light winds were out of the west, gusting to moderate, and blowing snow limited visibility. Our snow profile revealed the top layer of recently accumulated snow was fist hard and had a thin wind skin at the surface. Attention was paid to a soft layer around 97cm that had wind firmed snow above with a propagation saw test. No results from the PST. Compression tests gave failure in the uppermost new snow with moderate force, yet no alarming results. Many of the prone avalanche path starting zones were being loaded with new snow at a fast rate. Cracking within the new snow was mentioned by several skiers in the area.