2 Feb 2021

February 2, 2021

     YESTERDAY:

      Early Monday morning. 

     Lots of new snow in the valley.

      A grey day.

     Snowing in the afternoon.

      Still snowing in the valley at 16:15 Hours. Expecting another 20 cm.


Weather Observations for February 2, 2021 taken at 06:00 Hours.

2240 meters      -9, Winds were 30-40 KPH N--Horstman Hut
2180 meters      -8, Winds were 30-40 KPH S--Whistler Peak
1860 meters      -7, Winds were 10-20 KPH SE --Rendezvous 
1835 meters      -6, Winds were 15-25 KPH S--Round House
1650 meters      -5, 19 cm in 12 Hrs, 31 cm in 24 Hrs, Base 275 cm --Pig Alley
1570 meters      -5, 18 cm in 12 Hrs, 28 cm in 24 Hrs, Base 206 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +0.7, 6.3 mm of precip yesterday.


      As of 07:00 Hrs we have broken cloud and unlimited visibility.



FORECAST: 

A weak trough will bring mostly overcast skies for today with periods of light snow in a South Westerly flow aloft. We will see a few breaks. The FL will hover around 800 meters and drop back to surface tonight. Ridge builds in for Wednesday in a North Westerly flow aloft. Should see mostly sunny skies and cooler temps. A low quickly moves down the coast on Thursday with periods of light snow, cooler temps, and winds as high as 80-100 KPH. Unsettled Friday with a mix of sun and cloud. Guesstimates: 1-3 cm by Wednesday am, 0 cm by Thursday am, 4-8 cm by Friday am, 0 cm by Saturday am.


     GOES IR image from this am. 


       Low will move down the coast today, but far enough away for periods of light snow.





.       Looks like we are going to get drier.

       High pressure for Wednesday with mostly sunny skies.





      Low sends cloud and light snow down the Coast Thursday with cooler temps.



      AVALANCHE ACTIVITY:

     Female ski tourer buried and injured on Mount Cameron. Article & MIN report below.   AC Pic

       Snow biker buried and rescued from avalanche on Vancouver Island. MIN report below.  MIN Pic


     An avalanche has injured a skier in Wyoming. Article below.                                             Net Pic

      Sz 1.5 storm slab, Sc (ski cut) Feb 1, 2021. Min Report below. Chief Pascal area     David Cote Pic


     Avalanche mitigation on Blackcomb yesterday produced some Sz 1 Xe. 1-Sz 2 Xc.

      Avalanche mitigation across the valley on Whistler produced Several Sz 1-1.5 Xe, Xl, Xc, Sc.

From the Sea to Sky Avalanche Advisory:

Avalanche Summary

A natural avalanche cycle is expected on Monday night during the height of the storm. Widespread avalanches will remain likely on Tuesday.

There were numerous size 1-2 human and explosives triggered storm slab avalanches reported on Sunday.

There were several size 1-2 natural, human, and explosives triggered avalanches reported in the region on Saturday.

Snowpack Summary

With 10-20 cm of new snow expected Monday night, recent storm snow totals are reaching 45-90 cm by Tuesday morning. With an additional 5-10 cm possible on Tuesday, those totals could be reaching 50-100 cm by the end of the day.

This 50-100 cm of fresh snow sits on a recently buried 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.

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:

      SPAW  for Sea to Sky Area.


      New snow folding on roofs.

      Showcase T-Bar remained closed for the day.

      Snowing 2 cm per hour Monday afternoon.

     10 cm recorded at 1570 meters from 06:30 hrs to 14:30 hrs. Base now at 198 cm.

      That is a lot of snow. 759 cm of snow recorded at 1650 meters so far this season. ? weight.


      Always lots to do when the snow keeps coming.

     Wet snow later Monday afternoon at 660 meters. 6.3 mm recorded yesterday.


         Recent profile in Blackcomb Glacier


LOCAL AVALANCHE CANADA MIN REPORTS:

Blackcomb Resort Avy: Jan 31, 2021

Red Heather Meadows: Feb 01, 2021

Storm Slab-Duffey: Feb 1, 2021

Apostles/Lower Cowboy Trees: Feb 1, 2021


MIN Reports with Burials:

Snow biker buried and rescued on Vancouver Island: Jan 31, 2021

Ski tourer buried and injured, Mount Cameron, Vancouver Island: Jan 31, 2021



VIDEOS:

Avalanche mitigation work prior to body recovery: Park City, Utah

Major Avalanche Cycle-Lionshead: Montana

Powder Picker Feb 1, 2021: David Jones


ARTICLES:

Avalanche warning extended for Sea to Sky: Avalanche Canada

Snow Biker and Ski Tourer rescued from separate Vancouver Island Avalanches:  C-Fax

Female ski tourer injured in Vancouver Island avalanche, experts warn to be cautious: Mount Cameron

Avalanches claim four lives: Austria

Four skiers rescued from avalanche in Grand Teton National Park: Moose Jaw, Wyoming

Danger Patterns: EAWS

Roof avalanche destroys apartment in Lienz: Austria

Groundhog day: Feb 2, 2021



      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.  Winner of last pair was Thea Zerbe.


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