Valanga

Ruby Peak

Zach GuyGunnison
Vedi sulla mappa
Foto dell’osservazione 1Foto dell’osservazione 2Foto dell’osservazione 3Foto dell’osservazione 4Foto dell’osservazione 5Foto dell’osservazione 6Foto dell’osservazione 7Foto dell’osservazione 8Foto dell’osservazione 9Foto dell’osservazione 10

Quick report

Cracking
isolated

Southerly aspects have stronger, thicker crusts bridging underlying facets compared to other aspects.  Southeast aspects above treeline concern me more for persistent issues: some of the lower-angle start zones have thin, collapsible crusts similar to east-facing terrain. Note the slope angles in the profiles below.  

Stiff, obvious drifts were up to 12" thick and fairly isolated where we traveled, providing stubborn feedback.  We avoided a couple of drifted features in high-consequence terrain.  

We targeted a couple of recent drifts and produced minor cracking with aggressive stomps. Otherwise, we traveled on numerous steep slopes without signs of instability apart from some shallow sluffing.

Weather

Wind Loading
previous
Recent Snowfall
0
Snow Avail For Transport
small smounts

Clouds increased this afternoon. Light to moderate winds with minimal transport.

Snowpack

Steep, south-facing slopes have thick crusts that are supportive to skis and semi-supportive to boot penetration (sometimes boots punch through, sometimes not).  Southeast aspects above treeline held some thinner crusts in lower angle start zones (~30-34*), while steeper start zones held stronger crusts that would require much larger loading to collapse.  There were small-grained near surface facets (.3-.5mm) on the snow surface in areas where today's winds were minimal above soft settled snow.  About 4" to 10" of recent snow was above the warmup-crust except in scoured areas.  

Avalanche

Size
D1.5
Type
SS
Count
2
Aspect
SE
Trigger
N
Elevation
12800 ft

Good vis this morning revealed a few small windslabs that ran in the past 48 hours on Mt. Owen and in the Anthracite Range.