28 Dec 2018

December 28, 2018


    YESTERDAY:

    Early Thursday morning.

    Nice morning.

    Rainbow Mountain.

    Triconi Peak

    Clouds moved in by mid morning.

    White, aluminium and steel cables.

    Just before noon.

    Pyroclastic and Mt Cayley. Clouds in the morning, dissipated in the afternoon.

    Blue bird in the PM.

    Some accumulation!!

    Mount Weart.

    Just before sunset.Weak warm front pushing on to the coast..


Weather Observations for December 28, 2018  taken at 06:00 Hours.

2240 meters       -7, Winds were 30-40 KPH S-Horstman Hut
2180 meters       -7, Winds were 30-40 KPH SW--Whistler Peak
1860 meters       -5, Winds were 15-25 KPH SE--Rendevous
1835 meters       -4, Winds were 10-20 KPH S--Round House
1650 meters       -4, 1 cm of new, 1 cm in 24 hrs, Base 206 cm--Pig Alley
1565 meters       -6, 2 cm of new, 2 cm in 24 hrs, Base 144 cm--Catskinner
  660 meters       -4, Valley Temp, Max temp Yesterday was -1.5, 0.0 mm of precip recorded yest

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


FORECAST:

A warm front pushed in early this am with light precipitation in a Southwesterly flow aloft. The FL will slowly creep up during the day, reaching 1200 meters by tonight. The front will slowly move through into Saturday with the FL reaching 1800 meters Saturday morning then dropping to surface by Saturday night with a trailing cold front. Windy on Saturday with snow above 1500 meters until the cold front pushes through. A weak ridge will build for Saturday night into Monday. We can expect mostly unsettled weather Saturday night, clearing for Sunday with unsettled weather for Monday. A weak frontal band will arrive Monday night into Tuesday. Guesstimates: 15-25 cm by Saturday morning, 10-15 cm by Sunday morning in the alpine.



    GOES IR image from this am, moisture arrived a bit earlier than I had expected.

    Warming up today with light precipitation.




    Fronts along the coast.


    Northwest flow by Saturday afternoon with cooling temperatures.








    Ridging with cooler temperatures by Sunday.


    Unsettled Monday with a weak high and slightly warmer temps.


     AVALANCHE ACTIVITY:

    A 12 year old boy was buried for 40 minutes in an avalanche in LaPlagne. Article below. Net Pic

     Locally, Sz 1 ssl possible on steep terrain, Sc possible in very steep untracked terrain.




    INFORMATION & OBSERVATIONS:

    Coated with rime..

    Surface hoar, below tree line.

    Be aware in Whistler Bowl.

    Rimed cables!

    Great snow on Thursday.

    Pow turns still possible in the ski area boundary..

    Lower Body Bag Bowl.


Avalanche Canada MIN Reports:

Sentinal Ridge: Dec 27, 2018

Quick report: Dec 27, 2018


From South Coast Touring:

Yuki Kuroda
Just came back from a trip to Marriott Basin. On Dec 25, we skinned and boot pack to near a peak north of Wendy Thompson Hut. Our skin track caused Size 2 avalanche (more than a 100m path) while we skied. My friend skied down first, and as I was coming down, it released. Another avalanche of about the same size happened in a gully to the right of us. We didn't skin up this slope at all. We couldn't tell which avalanche happened first, but I think our skin track impacted the snowpack and triggered the avalanche on our slope, and this avalanche triggered another one. It was rated Moderate in Treeline and Alpine that day. The southerly wind that has been blowing snow has been creating wind crust on the south aspect we were on. We initially were planning to ski down the gully but noticed the change in snowpack and decided to ski down a different slope. No one was below us and nobody got hurt with this avalanche. Photos were taken with my phone so not the best.


                                                                                                                                                 Yuki Kuroda Image

Reid Madiuk
Blackcomb Backcountry 12-27-2018
Calm NE winds have not effected North Facing slopes. Best skiing was below 2100m. High alpine col’s and chutes are still very boney after the big wind event. 
Skied various ribs and gullies from east col to decker lake. 19th hole disease Ridge and top end of lower disease. Snow in general was very light with 30-40cm ski pen. Stability was generally solid. Cornices are not huge but very dry and fragile. We did ski cut out a cornice wind slab at 2000m NW aspect at ridge line 30-40cm deep and ran size 1 to the bottom of a 150m slope. 
For the most part the hazards were predictable and easy to mitigate if you know what you are looking for. ie soft cornice with wind slab on unsupported terrain. Sun felt warm today, but alpine temps stayed cold. No sun effect. Lots of experienced local folk out today. But in general not a lot of people out there.


Matt Gunn
Great conditions in the Musical Bumps, Cowboy Ridge and the Corral. Excellent snow quality. Only signs of instability observed were a couple small soft wind slabs (about 10 cm deep) in wind loaded areas. Singing Pass Trail is in great shape.




VIDEO FRIDAYS:

An avalanche in: Russia


ARTICLES:

Update on the 12 YO boy who survived 40 min Burial: LaPlagne

Avalanche dog finds boy after 40 minute burial: French Alps

B.C. Puppy has dreams of becoming an avalanche rescue dog: CARDA

Like a gift wrapped lump of coal: Avalanche Canada

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