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RegisterFeb 7th, 2021–Feb 8th, 2021
South Rockies.
Variable winds have mixed with recent snow, keep your head up for slabs in exposed terrain.
SUNDAY NIGHT - Cold, cloudy with isolated flurries / alpine low temperature near -30 / light to moderate northwest wind
MONDAY - Cold, mix of sun and cloud / alpine high temperature near -22 / light northeast wind
TUESDAY - Still cold, but sunny / alpine high temperature near -20 / light northeast wind
WEDNESDAY - Cold with less sun and more cloud / alpine high temperature near -20 / light to moderate northwest wind
Recent fresh snow has likely formed reactive wind slabs in wind loaded areas. Changing wind directions will mean that these wind loaded areas may potentially be found on any aspect.
On Friday there was a report of a size 2 explosives triggered wind slab avalanche, as well as a few size 1 human triggered dry loose avalanches. There was also a report of several natural avalanches, potentially up to size 3, a MIN report outlining these can be found here.
On Wednesday, numerous loose-dry natural avalanches were reported up to size 1.
Up to 45 cm of new snow fell over the past few days. The new snow was accompanied by strong winds, which redistributed snow to leeward slopes and terrain features forming fresh and reactive slabs.
Up to 70 cm of recent new snow sits above a plethora of older snow surfaces. In the alpine and at treeline the buried interface consists of stiff, wind affected snow, facets, surface hoar in isolated areas sheltered by the wind, and a crust on steep solar aspects. Below 1900 m a thick crust can be found underneath the recent snow.
A solid mid-pack sits above deeply buried decomposing crust and facet layers near the bottom of the snowpack (80-150 cm deep). Though unreactive under the current conditions, steep rocky slopes and shallow snowpacks should still be approached with caution.