12 Dec 2020

December 12, 2020


      Sunrise Friday am, 08:01 Hrs. -6 with a 5-10 NNE breeze. -1 in the valley.

     Power Flurry in the valley Friday am.

     An awesome morning.

      Some areas had a bit of blown in powder.

      Friday Dec 11, 2020. 14:00 Hrs. -7 with a 5-10 KPH variable breeze. 0 Deg C in the valley.

      Satellite image from the same timeframe.

      Alpin Glow Friday evening.

Weather Observations for December 12, 2020 taken at 06:00 Hours.

2240 meters      -9, Winds were 5-10 KPH W--Horstman Hut
2180 meters      -9, Winds were 5-10 KPH WNW--Whistler Peak
1860 meters      -6, Winds were 5-10 KPH ESE --Rendezvous 
1835 meters      -7, Winds were 5-10 KPH SW--Round House
1650 meters      -8, 0 cm in 12 Hrs, 2 cm in 24 Hrs, Base 100 cm --Pig Alley
1560 meters      -7, 0 cm in 12 Hrs, 2 cm in 24 Hrs, Base 64 cm--Catskinner
  660 meters      -6, Valley Temp, Max temp Yesterday was +2.6, 1.3 mm of precip yesterday.

     Saturday at 07:00 Hrs we have clear skies and unlimited visibility.


Upper level ridge will bring sunny skies for early this morning in a Northerly flow aloft. Scattered cloud will move in this am as well and increase later today in a Westerly flow aloft. The FL will hover around surface. Weak frontal band arrives Sunday morning near daybreak with  periods of light precipitation into early Monday am. Drying trend Monday morning with another weak front arriving in the afternoon with very light precipitation. May see some sunny breaks Monday morning. Slightly more active front for Tuesday with periods of light precipitation. A series of frontal bands will continue for much of the week. Friday could be the most active. Guesstimates: 0 cm by Sunday am, 2-6 cm by Monday am,  2-4 cm by Tuesday am, 8-12 cm by Wednesday am.

      GOES IR image from this am.

    Ridge in control this am but clouds will move in from the low. Cooler temperatures.

      Weak system for Sunday, will see light snow down to the valley.

      Weak system for Monday with seasonable temperatures.

      Low will bring more precip for Tuesday.


      Dry loose  on crust Friday am. Less than Sz 1 on Whistler. 

      Loose dry on steep terrain Friday am. Na on Whistler.

      Old wet slide out of the Weekend Chutes.

From the Sea to Sky Advisory:

Since Wednesday, both natural and controlled avalanche activity has been mostly limited to loose dry sluffs of diminishing size. A size 1 skier accidental storm slab was reported on a north aspect at 2000 m, with crown depth 10-30cm on Piccolo.

A widespread natural cycle occurred during the storm Monday night through Tuesday, storm slabs size 2-3 and loose wet size 1-2.



     Pits and more pits.

      There are places where the debris will require a lot of snow to make for some good turns.

      Great conditions for surface hoar.

     Dust on Crust in West Bowl. Challenging!

      Awesome day in the mountains.


420 Trees: Dec 10, 2020

Paul's: Dec 10, 2020

Brohm Ridge: Dec 10, 2020

Flute Bowl: Dec 11, 2020

Pump Peak: Dec 11, 2020


Powder Picker, Dec 11, 2020: David Jones

Avalanche Escape: Mael Ollivier


Avalanche Canada launches tutorial for Backcountry Beginners: Avy Savvy

Watch where you park in the backcountry: Colorado

We trust our intuitions even when they are wrong: HAT

Avalanche information for the Scottish Mountains: SAIS


     Arva Canada would like to help fund raise for the wayneflanavalancheblog and are offering a silent auction of the 
     Evo 5, Spark 240 Probe, Access TS shovel and Reactor 18 Airbag with canister. Opening bid is $949 plus taxes.
     Email your offer to atmrecyclingmike@gmail.com Other ARVA products are available at this e mail.

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