19 Dec 2019

December 19, 2019

    YESTERDAY:

    Wednesday Dec 18. 13:00 Hrs. -4.1 Deg C with a 15-35 KPH ESE wind, and snowing 1 cm/hr.

    Early Wednesday morning, if it was just 1-2 Deg colder.

    Moist humid clouds in the am.

    Still snowing at 1000 meters.

    Image from Wednesday afternoon.

    Wednesday just after noon. Atmospheric River heading South of our zone. We will still get some!!!



Weather Observations for December 19, 2019 taken at 06:00 Hours.

2240 meters      -8, Winds were 35-50 KPH ESE--Horstman Hut
2180 meters      -7, Winds were 45-65 KPH S--Whistler Peak
1860 meters      -6, Winds were 15-30 KPH SE --Rendevous 
1835 meters      -5, Winds were 10-25 KPH ESE--Round House
1650 meters      -4, 11 cm in 12 Hrs, 16 cm in 24 Hrs, Base 87 cm --Pig Alley
1560 meters .    -4,   6 cm in 12 Hrs,   8 cm in 24 Hrs, Base 34 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +1.9, 4.5 mm of precip yesterday.



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



FORECAST:

A weak cold front will push through today with periods of light precipitation in a West-Southwest flow aloft. An atmospheric river and associated warm front will brush by tonight with strong winds and moderate to heavy precipitation.  The freezing level will hover in the 900 meter range for today, rising to 1300 by Friday morning. Fingers crossed.  Hopefully the bulk of the energy associated with this event will remain South of our zone as it looks to be fairly warm. Friday will see cloudy skies with some periods of light precipitation, still possible to get some moisture from the event to the South. Saturday is looking mostly cloudy with a drying trend and weak ridging by Sunday. Ridge strengthens for Monday. Guesstimates: 20-35 cm by Friday morning, 5-15 cm by Saturday morning, 1-3 cm by Sunday morning.


    GOES IR image from this am.


    Low will continue to dominate on Thursday, warmer temperatures to our South!!:)





    Fronts along the coast, Good image of the Atmospheric River heading South.

      Friday a trough will bring periods of light precipitation, glad the brunt of the AR is South.





    Broad upper trough with some flurries, on Saturday.



    AVALANCHE ACTIVITY:

    Its touchy out there if you are exploring, especially where there are obvious hazards.!

    Avalanche control on Whistler yest produced some Sz 1-2 results. Dec 15 1F/SH > Nov 23 PWL.




    INFORMATION & OBSERVATIONS:

   Very little precipitation early Wednesay am.

    People are testing the obstacle course.

    It can be challenging!


    Avalanche closure at Jersey Cream. You can call 604-905-2324 for touring access information!!

    High in the valley yesterday was +1.9 Deg C.




FROM AVALANCHE CANADA MIN REPORTS:

Elphin Lakes: Dec 17, 2019



VIDEOS:

Recent control work at Three Mile Gap: HWY # 1

Whistler Weather with Meteroligist: David Jones



ARTICLES:

Snowboarder killed in Utah Avalanche was alone and did not have a transceiver: UAC Report

Recreational Backcountry users now have an Avalanche Forecast for the North Rockies: AvCan

Avalanche warning issued for Cascade Mountains ahead of the atmospheric river event: Wash State

Copper Mountain Resort confirms that recent avalanche was in open terrain: Colorado

Old Snow, Persistent Weak Layers, and Guided Groups: Pistehors.com

Avalanches and climate change will bury soldiers in Kashmir: India

Argyll avalanche leave walkers with minor injuries: Scotland

The trouble with all that snow making: Pique

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