YESTERDAY:
Sunrise Friday was at 07:50 Hrs.2240 meters -9, Winds were 50-75 KPH S--Horstman Hut
1860 meters -7, Winds were 10-30 KPH SW --Rendezvous
1570 meters -5, 2 cm in 12 Hrs, 2 cm in 24 Hrs, Base 151 cm--Catskinner
FORECAST:
A slow moving upper trough will bring periods of light snow for today in a South Westerly flow aloft. The freezing level will go up to around 1000 meters, dropping back down to 800 meters tonight. More active front arrives for Sunday with light to moderate snow. FL could go as high as 1200 m. Another front for Monday with periods of light precip. Guesstimates: 12-18 cm by Sunday am, 20-25 cm by Monday am, 10-20 cm by Tuesday am.
GOES IR image from this am.AVALANCHE ACTIVITY:
Soft slab North aspect Oboe. Sometime Friday. Chuck Ratzlaff ImageAvalanche Summary
Recent avalanche activity has been limited, following a pattern of human and explosives triggered small (size 1) releases; wind slabs where wind loading has occurred and loose dry where it hasn't.
Looking forward, expect progressively touchy conditions and increasing hazard over the coming days with forecast new snow and wind. Along with the usual surface instabilities, concern for a recently buried weak layer is also rising in step with this active weather.
Snowpack Summary
15-25 cm of new snow, favouring the south of the region, is expected to accumulate by the end of the day on Saturday. This will add to 10-20 cm of recent snow sitting on firm, wind affected snow at upper elevations, on surface hoar in sheltered areas, on a melt-freeze crust below 1900 m, and on a sun crust on south-facing slopes. Recent winds have redistributed much of this new snow, creating wind slabs in leeward terrain, and stripping the new snow off of some windward slopes.
A crust from early December may be found around 200 cm deep in the snowpack. In shallow rocky areas, recent test results suggest that it may still be possible to trigger this layer. In deeper snowpack areas it has shown no recent results and appears to be unreactive in these areas.
LOCAL AVALANCHE CANADA MIN REPORTS:
Rainbow Mountain: Jan 28, 2021
Metal Dome: Jan 29, 2021
Brohm Ridge: Jan 29, 2021
Chief Pascal: Jan 29, 2021
VIDEOS:
North Shore conditions report: NSR
Powder Picker Jan 29, 2021: Powder Picker
ARTICLES:
Two survive avalanche in Tatra Mountain Range: Poland
Snowplow operators body recovered after 30 days since an avalanche buried him: Spain
Three avalanches confirmed near Warm Springs Road in Ketchum: Idaho
Level 5 Avalanche warning: Alps
Weekend avalanche warning issued for South Coast: DailyHive
Marker Goggles for best avalanche picture Jan 19- Jan 31, 2021 in Sea to Sky Area.
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