6 Jan 2021

January 6, 2021


      Tuesday Jan 5, 2021. Sunrise was at 08:10 Hrs. -7 with a 15-35 KPH East wind. -2 in the valley.

     Early Tuesday morning.

      Lifts were on again off again. Strong winds. 150 KPH winds at 2240 meters just after noon.

     Some lifts opened and then closed.

      Some air time.

      Crazy how snow can maintain so many different shapes.

      Tuesday January 5, 2021. 15:00 Hrs. -5 with a 25-55 KPH SE wind. 0 deg C in the valley.

       Image from Tuesday, looking good for more snow.

      Snowing lightly in the village Tuesday evening.

Weather Observations for January 6, 2021 taken at 06:00 Hours.

2240 meters      -7, Winds were 60-70 KPH SE--Horstman Hut
2180 meters      -5, Winds were 45-70 KPH S--Whistler Peak
1860 meters      -5, Winds were 20-35 KPH SE --Rendezvous 
1835 meters      -4, Winds were 15-45 KPH SE--Round House
1650 meters      -3, 24 cm in 12 Hrs, 29 cm in 24 Hrs, Base 256 cm --Pig Alley
1560 meters      -3, 24 cm in 12 Hrs, 29 cm in 24 Hrs, Base 179 cm--Catskinner
  660 meters     +2, Valley Temp, Max temp Yesterday was +0.8,  6.9 mm of precip yesterday.

Max Gusts last night- 21:00 Hrs-179 KPH at 2240 meters. 12:45 Hrs-128 KPH at 2180 meters.

     As of 07:00 Hrs this am we have overcast skies, variable visibility and snowing very lightly.


A weakening front will bring some showers this morning with unsettled weather, some sunny breaks later this morning with mostly cloudy skies for this afternoon. The FL will hover in the 1000 meter range dropping to surface by tonight.  Dry overcast conditions will persist into Thursday as a high pressure builds to our East but clouds will be pushing into the area  from the large low in the North Pacific. We may see some sunny breaks Thursday, will depend on weather the high can actually gain some ground. A weak frontal band arrives Friday am, with periods of light precip into the afternoon, diminishing to unsettled weather with a mix of sun and cloud by the afternoon. A short wave ridge will bring unsettled weather for Saturday with a few light flurries. Weak front for Sunday with a significant storm arriving Monday into Tuesday. Guesstimates: trace to 2 cm by Thursday am, 0 cm by Friday am, 4-8 cm by Saturday am, 0-trace by Sunday am.

      GOES IR image from this am.

     Weakening cold front this morning bringing unsettled weather for the afternoon.

       A weak shortwave ridge for Thursday but will likely be dry and overcast.

      Weak frontal band from the offshore low on Friday.


      Joffre Shoulder D2 MIN report below.                                                                     Matt Miller Pic

     AC yesterday on Whistler & Blackcomb produced D 1-1.5 Xe, Xl, Sc. Touchy slabs. 1 D1 Sr.

      Solo ski tourer kicks out slab avalanche in Idaho. Article below.                                          Net Pic

     An avalanche has killed a married couple in the Schnalstal Valley, Italy. Article below.       Net Pic

      An avalanche has killed a ski tourer in Switzerland. Article below.                                         Net Pic

WIN a pair of Marker Goggles for the best avalanche picture in the Sea to Sky Corridor. Submit by January 17, 2021.

From Sea to Sky Avalanche Advisory:

Avalanche Summary

Expect an increase in storm and wind slab avalanches on Wednesady with new snow and strong to extreme wind Tuesday night. 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.

Persistent slab avalanche activity has tapered significantly since the cycle early last week, but persistent slabs size 2-2.5 were still triggerable by explosives on the weekend.

Snowpack Summary

Over 100 cm of recent storm snow 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.


     Tree skiing is getting better but tree wells are a problem.

      Still lots of hazards to be buried just under the surface.

     Knee deep powder mid mountain is always fun.

      Stress fractures in a snow drift, cornices are also getting large and fragile.

     We have received 186 cm of snow in the past week.

     At 1570 m we received 5 cm of new snow from 06:30 Hrs to 14:30 Hrs. Yesterday Base 168 cm.

      Tower 3 on the Blackcomb side is the tallest of the four towers on the Peak to Peak.

      Slurry in the valley. 0 Deg C with a mix of snow and water.


New snow has moves-South Coast: Jan 5, 2021

Round Mountain: Jan 5, 2021

Joffre Shoulder D2: Jan 5, 2021

Pauls Ridge: Jan 5, 2021

Gin Peak: Jan 5, 2021


Spicy conditions in: Utah

Outrunning an avalanche: Switzerland

Powder Picker Jan 5, 2021: David Jones


Solo-skier triggers avalanche near Schweitzer Mountain: Idaho

Six-hour Coquihalla closure for avalanche Control: Voice Online

Monday's avalanche on Mt Juneau could be a sign of more to come: Alaska

One killed in an avalanche in the Jura: Switzerland

Injured tourer rescued from an avalanche in: Austria

Married couple killed in an avalanche in: Italy

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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