28 Dec 2019

December 28, 2019

    YESTERDAY:

    Friday December 27, 2019. 12:00 Hrs. -6.1 Deg C with a 15-30 SW KPH wind.

    Overcast Friday morning.

    Multiple cloud layers.

    A few breaks in the afternoon.

    Sunset was at 16:15 Hrs.

    Friday afternoon.


    Big picture Friday.



Weather Observations for December 28, 2019 taken at 06:00 Hours.

2240 meters      -3, Winds were 35-50 KPH NE--Horstman Hut
2180 meters      -3, Winds were 25-40 KPH SSW--Whistler Peak
1860 meters      -6, Winds were 10-20 KPH S --Rendevous 
1835 meters      -5, Winds were   5-10 KPH W--Round House
1650 meters      -5, trace in 12 Hrs, trace in 24 Hrs, Base 93 cm --Pig Alley
1560 meters .    -5, trace in 12 Hrs, trace in 24 Hrs, Base 48 cm--Catskinner
  660 meters      -1, Valley Temp, Max temp Yesterday was +1.0, 1.1 mm of precip yesterday.

   As of 07:00 Hrs we have overcast skies, variable visibility and snowing lightly.


FORECAST:

Yet another weak front pushes on shore this morning in a Westerly flow aloft. We can expect periods of light precipitation this am diminishing by this evening. The freezing level might max out at 1000 meters. For Sunday, a weak upper trough and ridging will bring overcast skies with a dry air mass, might see some breaks and a likely inversion. Unsettled for Monday with weak ridging and some cloud from the low to our North. Might be a dry overcast day! A series of moist frontal bands in a Westerly zonal flow has good potential for some snow next week. At this time Thursday is looking promising for more than our recent 5-10 cm storms. Guesstimates: 3-6 cm by Sunday morning, Trace-1 cm by Monday morning, 1-3 cm by Tuesday morning.


    GOES IR image for this am.


    Weak short lived cold front for today with warmer temperatures.





    Fronts along the coast.

Weak upper trough with mostly overcast skies and some ridging for Sunday.





    High looks to be the stronger force for Monday. Deflecting the low. Unsettled weather.



    AVALANCHE ACTIVITY:

    Recent avalanche control at Solden, Italy. Xg. (Gasex)

    An avalanche has killed a climber on Gran Sasso, Italy. Article below.                                Net Pic

    Locally, avalanche control on Whistler with some testing. Sz 1-1.5 Xe. No activity on Blackcomb.


    INFORMATION & OBSERVATIONS:

    Not a good idea to venture into the trees.

   Old fracture line on the Curl.

    Blackcomb Bowl has a closure on it. Several people skied it yesterday. Closed means closed!!


                 Recent Profile




From Avalanche Canada MIN Reports:

Hanging Lake: Dec 26, 2019


VIDEOS:

Remotely Triggered Avalanches: Utah Avalanche Centre

Whistler Weather: David Jones


ARTICLES:

A climber has died in an avalanche on Gran Sasso: Italy

Weather preceding persistent deep slab avalanches: U of C

A snowboarder was killed in an avalanche in Sulden, Italy: Dec 24, 2019

A decision support tool for dry persistent deep slabs: Science Direct

What's a "persistent slab" and why should backcountry users care?: Jackson Hole

No injuries in three avalanches in Carinthia: Austria

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