14 Dec 2018

December 14, 2018

    YESTERDAY:

    Early Thursday morning.

    Snowing in the morning, from 06:00 Hrs to 14:00 hrs we had 11cm at 1565 m & 13 cm at 1650 m.

    Periods of moderate snowfall in the afternoon.

    At times it was windy with no precipitation during the afternoon.

    Raining at 18:00 Hrs at the Nester's weather station, 660 meters, 0 Deg C.

    12:30 Hrs yesterday.


Weather Observations for December 14, 2018  taken at 06:00 Hours.

2240 meters       -6, Winds were 25-50? KPH SE--Horstman Hut
2180 meters       -5, Winds were 80-140  KPH S--Whistler Peak
1860 meters       -3, Winds were 45-80 KPH SE--Rendevous
1835 meters       -3, Winds were 20-60 KPH SE--Round House
1650 meters       -2, 23 cm of new, 36 cm in 24 hrs, Base 176 cm--Pig Alley
1565 meters       -1, 17 cm of new, 28 cm in 24 hrs, Base 108 cm--Catskinner
  660 meters        0, Valley Temp, Max temp Yesterday was +0.6, 32.8 mm of precip recorded yest

    As of 08:00 hrs this am we have overcast skies and unlimited visibility.

FORECAST:

A brief lull this morning before another frontal band brings strong winds, moderate precipitation in a Southerly flow aloft. The flow aloft will eventually switch to Southwesterly. The FL may peak at around 1500 meters than drop down to the surface by tomorrow morning. A weak ridge will bring mostly cloudy skies for much of Saturday with the occasional sunny break in the am. Another frontal band arrives for late Saturday night into early Sunday morning. A series of weaker frontal bands will bring light to moderate precipitation with cooler temperatures to our zone early next week easing off by next Friday and Saturday. Guesstimates: 25-35 cm by Saturday morning, trace -1 cm by Sunday morning, 20-30 cm by Monday morning. Have possibly gone a bit high on the amount for today, front could go north leaving us with less snow, lets hope it stays on track. Strong winds today at 1860 meter level.


    GOES IR image from this am, most of the moisture went North.


    Some cooling this afternoon with the passage of the warm front.

    Warm front followed by a cold front.

    FL dropping back down to 1000 m level.



    Fronts along the coast.


     Deep low will bring strong winds again tomorrow.


    Weak ridge for Saturday morning.


    Another significant low heading our way.



    AVALANCHE ACTIVITY:


   Two skiers caught in an avalanche on Cirque Forepeak, BNP Dec 8th.  Article below.          Parks Pic

   90 cm crown line Beer Belly Sc (ski cut) Thursday morning close to Staircase..

    Slid on 18-1-08 Sh/Fc.

    Looking up Beer Belly. Sz 1.5-2? with possibility of being buried in front of a tree.

           Fracture line profile.


    Areas of buried surface hoar are out there. Crust just below . Moist snow below crust below treeline.

   No involvement but be very careful on convex rolls just below treeline.

    Debris went 50-60meters, and piled up in front of trees. Would be a nasty ride.


                                                                                                                                                                      Toby Salin Pic
Went sledding up Rainbow via Cougar mtn FSR. triggered a sz 1 right on the road a few K heading up towards Soo valley. Triggered by sled from below on road. Full meter + of unconsolidated storm snow ripped right to the ground right on top of my sled. No human burial. Big hang fire with a shooting crack only supported by a tree... we dug out sled, turned around and called it a day. Hair trigger unconsolidated snowpack. Buyers beware! Toby

    Thanks for the intel Toby, very touchy avalanche problem yesterday.                                                       Toby Salin Pic

    INFORMATION & OBSERVATIONS:


   Two tree well incidents requiring evacuation on WB Thursday morning.


   People were getting partially buried and stuck everywhere.!


    Storms are the best!!!


    Avalanche closure yesterday for the alpine, very sporty at tree line.

    Blackcomb Gondola scheduled to open today.


   Big picture yesterday afternoon.


From Avalanche Canada MIN Reports:

Cayoosh: Dec 13, 2018

From South Coast Touring:

Jeff Rabinovitch
Yesterday I witnessed a near fatality on Ratfink at Whistler. Just after 10am (my first run after waiting until 9:15 at Creekside for the lifts to open), I was skiing/pushing a trench downhill skier's right side of Ratfink. I stopped at the plateau just before the last little pitch from where the road to Harmony is visible when I heard a woman shouting from above. She was just below a line of trees. Her companion was buried under the snow among a few smaller trees. The person standing beside me called patrol. Three others started traversing across towards her in waist-deep snow. Two others and I also started traversing while she dug frantically. It would have taken me 15 minutes to get to her. Soon others arrived from above and joined her. Luckily they pulled him out and thank goodness he was breathing. Ski patrol arrived shortly after. Be careful out there. Trees are buried but not filled in.

Hector Silva Peralta
Hello everyone, I just want to share what we saw yesterday.
First thing we noticed is that whistler out of bounds should be considered as backcountry on this days, it is not groomed or patrolled , no avalanche control or ski compacted snow, we dug 2 test profiles and found touchy Storm slabs and wind slabs,
We stayed at TL and BTL. 
Hazard rating was considerable.
As we were skiing down we got to a convex roll and decided not to ski this, we avoided this feature to the side, we did some hand shears and we noticed some fractures within the Storm snow down 50cm, as I was doing the hand shears a party of 4 skiers went down the convex roll that we just decided not to ski.
Luckily it did not release, luckily because they were not wearing avalanche gear, they were resort skiers, we found a low angle ramp to ski to the side and went down with no problems and skiing was awesome.
We tried to communicate this same message to them in a friendly way.
However they were not interested in our point of view.
What do you do when you see hazardous attitudes, do you say something or just keep doing your thing? how would you deal with this ? thank you 


Steve Andrews
Guys and gals I triggered a decent avalanche, a good size 2, in bounds on Whistler yesterday, almost as deep as my head and it ended up propagating I'd say 60 or so feet then ran I'd guess 250m then crossed the Dave Murray. Be very careful and carry rescue gear if you go off piste!



Video Friday:

Controlled Avalanche: Switzerland

High School Avalanche Program: Jackson Hole

Car Top Speed Training: 180 KPH


ARTICLES:

Special Public Avalanche Warning: Avalanche Canada

Two skiers caught in an avalanche along Ice fields Parkway: Banff National Park 

Avalanche warning issued as stormy weather continues: Washington State

Avalanche shuts down Loveland PassColorado

People living on Mountains face avalanche of climate risks: Scientific America

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