YESTERDAY:
Thursday sunrise was at 07:41 Hrs. -6 with a 5-15 KPH NNE wind. 0 Deg C in the valley.2240 meters -7, Winds were 40-50 KPH N--Horstman Hut
1860 meters -5, Winds were 15-20 KPH NNE --Rendezvous
1570 meters -4, 2 cm in 12 Hrs, 3 cm in 24 Hrs, Base 188 cm--Catskinner
FORECAST:
Ridging for today with mostly sunny skies and some cloud in a North West flow aloft. The FL might get up to around 1200 meters, dropping back down to 800 tonight. The next warm frontal band will bring an impulse of precip on Saturday with steady light precip and the FL hovering in the 800-1000 meter range. The trough of low pressure will bring periods of light precip on Sunday with cooler temperatures influenced by the arctic front. Ridge pushes in for Monday with sunny skies and cold temperatures. Looking like dry cold weather for next week. Guesstimates: 2-5 cm by Saturday am, 15-25 cm by Sunday am, 4-8 cm by Monday am. Most models are only calling for 5 cm snow on Saturday. Time will tell!!
AVALANCHE ACTIVITY:
An avalanche has killed a skier on Marvins Avalanche Path East of Vail. Article below.VSP PicFrom Sea to Sky Avalanche Advisory:
Avalanche Summary
In the clear weather on Wednesday, evidence of a widespread natural storm slab avalanche cycle was observed. It is suspected to have occurred during the storm on Monday night.
There have been reports of numerous size 1-2 natural, human and explosives triggered avalanches every day since Saturday. Many of these avalanches have failed on the recently buried persistent weak layer. Most recently, explosive control work conducted on Wednesday produced size 2 cornice and storm slab avalanches.
Snowpack Summary
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:
Image of Cowboy Ridge taken Wednesday. Still see the old avalanche. Chuck Ratzlaff PhotoLOCAL MIN REPORTS:
AST 2-Coast Mountain Guides: Feb 4, 2021
Sky Pilot Zone: Feb 4, 2021
VIDEOS:
Boy rescued from an avalanche: Russia
Powder Picker Feb 4, 2021: David Jones
ARTICLES:
Avalanche kills skier in popular backcountry are East of Vail: Colorado
A backcountry skier has been killed on Etna Summit: California
Update on the 3 hikers killed in an avalanche near Anchorage: Alaska
Park City Mountain restricts backcountry access : Utah
Update on the avalanche fatality on Mt Washington: New Hampshire
Details on Silverton Avalanche Fatalities: CAIC
Details from Vail Avalanche Fatality: CAIC
Snow avalanches on Mt St Helens: Washington State
Hone your skills online with Chris Davenport: Powder Cloud
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