Manto nevoso

Northern San Juan

Chris DicksonNorthern San Juan
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

Weather

A cold morning gave way to increasing ambients temperatures and strong sunshine. In this area, winds were light out of the north, and I didn't observe any wind transport.

Snowpack

Below treeline, the snowpack is largely weak and cohesionless. I traveled intentionally into untracked willowy areas, and could not buy a whumph. No cracking or collpasing as I ascended below treeline. But, in a pit at treeline on an east-facing slope, I found a 4-finger hard slab of more recent snow, sitting above the December drought layer. An extended column test yielded a result of ECTP17. This type of terrain presents the sweet spot for where you could trigger an avalanche in this area. Above treeline, winds molded newer snow into stiffer 1-finger hard slabs in the midpack which were unreactive in long column tests. Surface conditions above treeline were a mix of soft wind-ripple and stiffer wind-skin.