Manto nivoso

Schweitzer South Bowl Backcountry

Kyla Berendzen, KaliRose ZurfluhSelkirk Mountains
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Foto de la observación 1Foto de la observación 2Foto de la observación 3Foto de la observación 4Foto de la observación 5Foto de la observación 6Foto de la observación 7Foto de la observación 8

Quick report

The top 20-25cm of recent storm snow was well distributed on the aspects we traveled, covering up the more wind-affected snow deposited earlier in the storm cycle. The melt-freeze crust that has formed since Sunday is up to 3cm on S aspects and but less than 1cm on N aspects, allowing for great turns. The surface hoar present on all aspects is not yet wind- or sun-affected, and if it remains and continues to grow will necessitate observation after the next round of precipitation. 

Weather

Cloud Cover
obscured
Wind Loading
previous
Recent Snowfall
0
Snow Avail For Transport
moderate amounts

Cloud layer hovering between 5500-6000' ft near the top of the Lakeview triple when we arrived, but rose again and obscured the sky with fog around 1000, then dropped again to ~5500' around 1300 so that the higher peaks were visible above the clouds. Calm, or winds from the S/SW.

Snowpack

Surface hoar 6-10mm in size on all aspects at these upper elevations. Below that, a melt/freeze crust 1-3cm thick (thicker on the S aspects that received more sun on Monday January 6). The 35cm of recent, softer snow (from Thursday through Sunday) below that varies in depth with wind-loading and contains some interfaces within these layers (CT11 and CT 13 approximately 20cm down); the significant winds and their changes in direction likely influence the depth of and adhesion between these interfaces. Below that there is a melt-freeze crust 30-40cm down with graupel underneath and several crusts still present lower in the snowpack, but stability tests did not yield any reactivity in these lower layers.