15 Dec 2019

December 15, 2019

   YESTERDAY:

    Saturday December 14, 2019. 12:00 Hrs. At 1860 meters it was -4.2 Deg C with a 5-10 SE wind.

    Early Saturday morning, nice to see the snow guns running!!

    Breaks to the West in the am.

    Saturday afternoon. Looking nicer to the South.

    Big picture on Saturday afternoon..


Weather Observations for December 15, 2019 taken at 06:00 Hours.

2240 meters    -12, Winds were 20-30 KPH NNE--Horstman Hut
2180 meters    -11, Winds were 10-15 KPH NNW--Whistler Peak
1860 meters      -9, Winds were 10-15 KPH NNE --Rendevous 
1835 meters      -9, Winds were     0-5 KPH SSW--Round House
1650 meters    -10, trace in 12 Hrs, trace in 24 Hrs, Base 50 cm --Pig Alley
1560 meters .    -9, trace in 12 Hrs, trace in 24 Hrs, Base 17 cm--Catskinner
  660 meters      -4, Valley Temp, Max temp Yesterday was +0.9, 0.0 mm of precip yesterday.


    As of 07:00 hrs this am we have clear skies and unlimited visibility.


FORECAST:

High pressure for today in a Northwest flow aloft. Sunny skies this am with cloud pushing in this afternoon, becoming overcast later in the day. The freezing level will remain below surface! A weak warm front will push in on Monday morning with light steady precipitation, increasing Monday night into Tuesday morning. The FL could get up to 1400 meters in a West-Southwesterly flow aloft. A series of frontal bands will bring steady light precipitation into the weekend. Good chance we will see moderate snowfall Wednesday, Thursday, and Friday night. The real deal!! Guesstimates: 0 cm by Monday morning, 8-12 cm by Tuesday morning, 10-15 cm by Wednesday morning.


    GOES IR image from this am.


    Upper level ridge for today with increasing cloud later in the day.





    Fronts along the coast.

     Warm front for Monday with moderate winds and increasing FL..





     Low will continue to send precipitation and windy weather for Tuesday.



    AVALANCHE ACTIVITY:

    Avalanche activity on Oboe. Observations below related to this event.            Matt Bruhns Image.

    Oboe activity. Check out early season conditions-- below from MIN Report.     Matt Bruhns Image




    INFORMATION & OBSERVATIONS:

    Humid clouds made it feel cold Saturday morning.

    Temperatures will be good for snow making on Sunday.

    Making it work. Tough with limited terrain for a race!!

    Looks like nice snow, as per reports below,  travel and ride with caution.        Matt Bruhns Image


    Observations and pic from Dave Sarkany:

     ECTP25 down 45cm. On 191123 FCC. 2mm fc 2325m NW asp below Blackcomb pk. 100m SE of E Col.



Avalanche Canada MIN Reports:

Early Season Conditions: Dec 13, 2019


From South Coast Touring:

Observations from Mitch Sukers:
December 14th, Blackcomb Benches. Snow depth from 40-120cm at 2100m elevation on W through NW aspects. Test pit at 2100m WNW aspect 24 degree slope found most snow consolidated over and under the 191202 crust and over the 191123 crust. 10cms of rounding facets under the 191123 produced a CTH (24) sudden planar repeatable down 81cm. Foot penetration varied from 10-30cm.
In addition to yesterday's remote triggered 1.5 storm slab on Oboe, an additional sz 1.0 appeared to have released naturally on Oboe Ride just at treeline (NW Aspect) and one of the just above treeline convexities NE asp in the Corral had also released to sz 1.0.
Riding conditions were fine at these aspects and this elevation, which has not been the case in other nearby sites.
Currently, the main concern is the unseen sharks under apparently smooth surface snow. With a wide variation in snow depths, it is very important to know the ground surface characteristics where one is riding and to use caution while riding. Lots of evidence that folks are doing a lot of geological tagging while skiing alpine slopes...

VIDEOS:

Persistent Weak Layers: Avalanche Guys


ARTICLES:

Backcountry--Know the snow before you go: Vail Daily

Good News for North West Snow: Cliff Mass Weather Blog

New fleet of Robotic Vessels off West Coast will improve weather monitoring: CBC News

ENSO report Dec 12, 2019: NOAA

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