YESTERDAY:
Sunrise Friday was at 07:39 Hrs. -3 with a 30-40 KPH NNE wind.2240 meters -8, Winds were 45-60 KPH N--Horstman Hut
1860 meters -6, Winds were 20-35 KPH SE --Rendezvous
1570 meters -4, 3 cm in 12 Hrs, 3 cm in 24 Hrs, Base 188 cm--Catskinner
A weak low and accompanying warm front will bring light precipitation to the area in a North West flow aloft. The FL should top out at around 1000 meters, dropping back down to surface by tomorrow. A weak trough will bring periods of light precipitation for Sunday with cooler air pushing in from the Arctic Front. We may see a few breaks later in the afternoon on Sunday. More flurries Monday morning with a brief break with some cloudy weather in the afternoon, more flurries for the evening. Much colder on Monday with more of the same on Tuesday. Guesstimates: 5-25 cm by Sunday am, 5-10 cm by Monday am, 2-4 cm by Tuesday am.
AVALANCHE ACTIVITY:
Sa Sz 1 traversing to Vista Chute from yesterday. Mike Belanger PicFrom Sea to Sky Avalanche Advisory:
Avalanche Summary
Skier triggered wind slabs up to size 1.5 were reported on Thursday. Explosive control work conducted over the last few days have produced size 2 cornice and storm slab avalanches.
Earlier in the week, many of the numerous size 1-2 natural, human and explosives triggered avalanches were reported to have failed on the recently buried persistent weak layer.
Snowpack Summary
Westerly winds are likely redistributing surface snow into wind slabs in leeward terrain features at upper elevations. 50-100 cm of recent snow sits on a persistent weak layer that consists of facets at upper elevations, surface hoar in sheltered areas, a melt-freeze crust below 1900 m, and a sun crust on south-facing slopes. There could be more than 100 cm on this layer in wind loaded areas.
A crust from early December may be found around 200+ cm deep in the snowpack. In shallow rocky areas, it may still be possible to trigger this layer. In deeper snowpack areas, it appears to be unreactive.
INFORMATION & OBSERVATIONS:
06:30 Friday. Valley cloud with clear skies above.LOCAL MIN REPORTS:
Touchy Wind Slab: Feb 4, 2021
Metal Dome: Feb 5, 2021
Cayoosh Pass: Feb 5, 2021
Avalanche on the way to Heartstrings: Feb 5, 2021
VIDEOS:
Steady snowfall, increasing danger: Montana
Powder Picker Feb 5, 2021: David Jones
ARTICLES:
Skier killed in East Vail avalanche identified as long time local John Kuo: Colorado
Detailed report on Etna, CA avalanche fatality: CAIC
Avalanche warning ends for Vancouver Island , South Coast: Avalanche Canada
New snow pushes avalanche danger to high, more powder on the way: Wyoming
Spring Like conditions, daytime danger cycle in Austria: Avalanche.report
Submit your best avalanche photo to for a pair of Goggles Feb 1-28, 2021. Sea to Sky Area.
Thanks to Volkl Canada for sponsoring.
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