10 Dec 2019

December 10, 2019


    YESTERDAY:

    Monday December 9, 2019. 13:00 Hrs. +3.6 deg C with a 0-5 KPH South Breeze.

    Early Monday morning.

    Pre Frontal clouds were moving in by the afternoon.

    Great clouds Monday afternoon.

    Monday's Sunset.

    Image from Monday afternoon.


Weather Observations for December 10, 2019 taken at 06:00 Hours.

2240 meters      -2, Winds were 40-50 KPH SE--Horstman Hut
2180 meters      -1, Winds were 35-50 KPH S--Whistler Peak
1860 meters       0, Winds were 10-20 KPH SW --Rendevous 
1835 meters     +1, Winds were 15-25 KPH SE--Round House
1650 meters      -1, 0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 38 cm --Pig Alley
1560 meters .     0, 0 cm in 12 Hrs, 0 cm in 24 Hrs, Base   9 cm--Catskinner
  660 meters      -3, Valley Temp, Max temp Yesterday was +0.1, 0.0 mm of precip yesterday.

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



FORECAST:

A weakening frontal band is pushing through today in a Southwesterly flow aloft. The freezing level will slowly drop to around 1000 meters by tonight as we switch to a Westerly flow aloft. Unsettled this am, but should see some light snowfall at around noon until this evening. Another frontal band will push through Wednesday afternoon with light precipitation into Thursday morning. A weak upper trough will bring periods of light precipitation into Friday. Looks like we may see some weak ridging for Saturday. Guesstimates: 1-3 cm by Wednesday morning, 10-15 cm by Thursday morning, 8-12 cm by Friday morning.


    GOES IR image from this am.


     Low will send a weak frontal band into the area this afternoon.






    Fronts along the coast.

    More active frontal band for Wednesday, a bit warm but could get more than 10 cm!!





    Weak trough for Thursday, still might get at least 10 cm at tree line.

    AVALANCHE ACTIVITY:

    Update on the avalanche fatality in Colorado.

    Results from Sunday.





    INFORMATION & OBSERVATIONS:

    Signage at the top of JC Chair.

    Happy uphill skiers on Whistler, heading to Pikas Traverse. High at 1835 m yest was +3.7 Deg C.

    High cloud slowly moved in during the afternoon.

    Snow looks nice in the alpine.

    We need snow!!!!

        Recent profile.

    Observations and Photo from Guillaume Otis, from South Coast Touring.


We have an interesting start of the season here on the coast to say the least. The unseasonably dry and sometime cool conditions have left us with a question mark to where we stand with the snowpack stability and avalanche hazard. Yet very few avalanche have been observed, the snowpack has produce positive and negative result throughout the past few days. We have found good skiing above 1700m with better coverage on Whistler than Blackcomb. The photo below really shows the different layers of wind slab, crust and sugary crystals this years snowpack is made off. Taking an avalanche course right now is a great way to learn about the many facets of avalanche hazard. At the moment our advise is to proceed with caution and gather more snow observation to make educated decision in avalanche terrain. The uncertainty and the spooky nature of the snowpack has our confidence in the stability fair to poor. Stay safe!



From Mountain Conditions Report:

Blackcomb Backcountry: December 8, 2019


From Avalanche Canada MIN Report:

Spooky Snowpack: Dec 7, 2019




ARTICLES:

CAIC report on the fatal avalanche on Diamond Peak: Colorado

Buried an hour, hiker survives Anchorage avalanche after stranger spots legs: Alaska

How many backcountry Skiers are out there: Moutain Culture

Do avalanche air bags lead to riskier choices among backcountry and out-of-bounds skiers: SFU

Better estimating snowfall depth remotely: PhysOrg

Action will speak louder than words: Pique

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