20 Dec 2019

December 20, 2019

    YESTERDAY:

    Thursday December 19, 2019. 14:30 Hrs. - 4.6 Deg C with a 20-45 KPH ESE wind. Snowing!!

    Snow conditions are improving quickly.



    People exploring everywhere.

    Snow below 1000 meters, wet snow to the valley.

    Thursday afternoon, thick clouds over Whistler.

    Thursday afternoon, AR flowing to the South.

    Thursday evening. 3.9 mm recorded from 17:00 Hrs to 18:00 Hrs at 1650 meters.




Weather Observations for December 20, 2019 taken at 06:00 Hours.

2240 meters      -5, Winds were 50-80 KPH ESE--Horstman Hut
2180 meters      -4, Winds were 55-85 KPH SE--Whistler Peak
1860 meters      -3, Winds were 15-35 KPH S --Rendevous 
1835 meters      -3, Winds were 15-35 KPH SE--Round House
1650 meters      -1, 20 cm in 12 Hrs, 31 cm in 24 Hrs, Base 106 cm --Pig Alley
1560 meters .    -1, 18 cm in 12 Hrs, 29 cm in 24 Hrs, Base 68 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +0.5, 10.9 mm of precip yesterday.

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


FORECAST:

An upper level trough will bring periods of light precipitation for today in a Southwest flow aloft. The freezing level should hover in the 1000 meter range. The trough will weaken on Saturday with breaks by the afternoon as the air mass drys out. Unsettled for Sunday with weak ridging and colder temperatures. As of now Monday looks like a sunny day. Next snow producer will arrive for Christmas Night/Boxing Day. Guesstimates: 10-15 cm by Saturday morning, Trace - 2 cm by Sunday morning.


    GOES IR Image from this am.


      Upper level trough for today with light precipitation and the FL hovering in the 900 m range.





     Fronts along the coast.

    Weakening upper level trough with possible breaks by the afternoon for Saturday.





     High pressure begins to push in for Sunday with unsettled weather.



    AVALANCHE ACTIVITY:

    Avalanche control on Whistler Thursday produced Sz 2-2.5 Xe, Xl, Na, Sc, Xy. One sz 3.

    Sz 3 Xe. Avalanches occurring on the PWL November 23 Crust.

    Camel hump Sz 2.5 Xy.



    INFORMATION & OBSERVATIONS:

    Nice turns to be had on Thursday.

    Crystal Zone opened!

    Ski and ride with care if outside the ski area boundary.

    Drifting at tree line.

    Snowing in the valley on Thursday afternoon. High at 660 m was +0.5 with 10.9 mm recorded!!


AVALANCHE CANADA MIN REPORTS:

Disease Meadows: Dec 18, 2019



ARTICLES:

High Avalanche Risk forecasted for B.C. Interior: AvCan

300+ avalanches already reported across Colorado in December alone: OutThere

Avalanche control West of Revelstoke Thursday: Road Closure

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