7 Jan 2021

January 7, 2021


      First ride up Wednesday am.

      Snowing most of the early am.

      Storm riding in the alpine.

      Fun skiing!!

      Patches of blue before noon.

     Nice powder in the lower elevations as well.

      Wednesday January 6, 2021. 14:30 Hrs. -5 with a 10-25 KPH South wind. +2  Deg C in the valley.

      Another sucker hole later in the afternoon.

Weather Observations for January 7, 2021 taken at 06:00 Hours.

2240 meters      -8, Winds were 25-30 KPH SE--Horstman Hut
2180 meters      -7, Winds were 25-30 KPH E--Whistler Peak
1860 meters      -6, Winds were 10-20 KPH S --Rendezvous 
1835 meters      -5, Winds were 10-20 KPH S--Round House
1650 meters      -5, 0 cm in 12 Hrs, 9 cm in 24 Hrs, Base 249 cm --Pig Alley
1570 meters      -5, 0 cm in 12 Hrs, 6 cm in 24 Hrs, Base 159 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +2.5, 8.3 mm of precip yesterday.

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


Dry but mostly cloudy weather today in a South Westerly flow aloft. Will see some sunny breaks briefly this am but we are right on the border of a high pressure to the East and a low pressure to the West. The FL will rise and hover in the 1000 m range before dropping back down to surface tonight. A very weak front arrives early Friday am with some light precip ending around noon. Lingering cloud will bring overcast conditions with a slight chance of a brief sunny break. Weak ridging Saturday will bring dry unsettled weather with a mix of sun and cloud.  Another weak front arrives on Sunday with light precip. More active front for Monday with a vigorous front arriving Tuesday. Guesstimates: 4-8 cm by Friday am, 2-6 cm by Saturday am, trace-2 cm by Sunday am, 2-6 cm by Monday am. 

      GOES IR image from this am.

Mostly cloudy today with the low pushing to the East.

            Weak brief front for Friday am, with unsettled weather in the afternoon.

       Weak ridging for Saturday with a mix of sun and cloud.


     Avalanche control on WB yesterday produced D 1-3 Xe, U, Sa, Xh, Sc. D3 down to Dec 9 crust.

From the Sea to Sky Advisory:

Avalanche Summary

On Wednesday there were several size 2 explosives controlled storm slab avalanches reported running in the alpine and treeline.

Reports on Monday and Tuesday show a few explosives controlled storm slab avalanches running size 1-2 as well as a few human triggered storm slab and loose dry avalanches size 1-1.5. 

A large, natural storm slab avalanche cycle size 3-4 occurred near Pemberton over the weekend. Natural and explosive triggered storm slabs size 1-2 were reported elsewhere. This MIN report from Friday illustrates the active avalanche conditions during the weekend storm.

Snowpack Summary

Over 150 cm of recent storm snow from the past week has seen extensive wind effect at upper elevations, with scoured windward aspects, wind slabs in lee features and growing cornices at ridgetop.

The snowpack is currently quite complex. The layer of greatest concern is a melt-freeze crust from early December, found around 100-200 cm deep in the snowpack. This crust may have surface hoar or sugary faceted grains sitting above it. There have been several recent large natural and human triggered avalanches on this layer and new snow loads as well as large loads from storm slab avalanches have potential to trigger these layers.

Marker goggles up for grabs for best avalanche picture from now to January 17, 2021.

Submit photos to wwflann@me.com.


     First ride up GE was at 09:54 Hrs. Powder to the People.

     Spin drift in Swiss Cheese.

     We have had 586 cm of snow so far this winter measured at 1650 meters. 

      Hanging in there. Wonder how long before it collapses??

         Blackcomb Patrol have been cracking the alpine in record time.

      Busy on Spanky's Ladder.

      Nice to get some skier compaction on Harmony.

                                                                          Toby Salin Image
    Epic recovery of an injured backcountry skier Tuesday night. Awesome work by Whistler SAR. 


New Zealand Track: Jan 6, 2021


Check Yourself-Check Your Friends: Safety First

Powder Picker January 6, 2021: David Jones

Nasty Snowpack, Jan 6, 2021: Colorado


Roof avalanches have killed 4 people in North Eastern Japan: Akita

Snowboarder dies on Mount Washington-SIS or Tree Well??: Vancouver Island

Avalanche concerns made for a hazardous rescue near Lumby: VSAR

Danger! Persistent weak layer at altitude: France

Avalanche Warning--22 Families evacuated in Kulgam: Kashmir

WANTED any transceiver either working or not

$150 reward for trading in on a new Arva Neo Pro at $499 
$100 reward for trading in any transceiver in on an Evo 4 at $329 or Evo 5 at $385

Mike Dempsey
Your representative in Canada and the United States for ATMRECYCYCLINGSYSTEMS.COM and VORTEXDEPOLLUTION.COM in Canada

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