28 Nov 2018

November 28, 2018


    Yesterday:

    Overcast in the morning.

    Breaks in the late morning.

    Skiing on new wind deposited snow.

    Clouds moved back in later on in the afternoon.

    Precipitation started around 14:00 Hours.



Weather Observations for November 28, 2018  taken at 06:00 Hours.

2240 meters         -6, Winds were 30-60 KPH SE--Horstman Hut
2180 meters         -6, Winds were 20-65 KPH SSW--Whistler Peak
1860 meters         -4, Winds were 10-30 KPH S --Rendevous
1835 meters         -4, Winds were 10-20 KPH S--Round House
1650 meters         -2, 12 cm of new, 12 cm in 24 hrs, Base 64 cm--Pig Alley
1565 meters         -2, 8 cm of new, 8 cm in 24 hrs, Base 32 cm--Catskinner
  660 meters        +4, Valley Temp, Max temp Yesterday was +7.4, 23.4 mm of precip recorded yest


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


Forecast:

Expect unsettled weather as a broad upper trough remains in the area with a Southwest flow aloft. Good chance of some flurries this afternoon with the freezing level hovering in the 1200 meter range, dropping to 1000 meters by tonight. Drier conditions but unsettled for Thursday with a mix of sun and cloud, slightly cooler temps as we get into a Westerly flow aloft. Unsettled again Friday with the chance of some very light snow flurries but the upper trough forecasted for the area may just go South, so another unsettled day with a Northerly flow aloft! FL will likely drop below the surface. Saturday into early next week will likely see sunny skies and colder temps.
Guesstimates: Trace to 2 cm of new snow by Thursday morning.


    GOES IR image fro this am.


    Very broad upper level trough. 





    Fronts along the coast.


    Weakening upper level trough with a dry stable air mass.




    High and arctic air to the North will push onto the coast for colder temps by Saturday.

Avalanche Activity:

The red line in the center shows the skier’s path. The skier was caught in a slide and dug out at the location of the star. The longer line shows the path of the avalanche in the McFarlane’s area off Richmond Ridge. (Colorado Avalanche Information Center)

Aspen guide survives burial. Story below.





    Avalanche debris from a natural cycle during the storm. Tues Nov 27, 2018.

    Wet debris from during the storm Monday into Early Tuesday.


    Information & Observations:

    Last storm did help the Alpine. Natural cycle with SZ 2.5 to Sz 1 observed yesterday.

    Strong winds in the Alpine Tuesday afternoon. 113 KPH Gust at 2240 meters at 11:30 am.

    Rain Runnels at 1700 meters.

    Strong winds at around noon, recent natural avalanche debris on steep lee slopes.



From Avalanche Canada MIN Reports:

Whistler Off Piste: Nov 27, 2018



Articles:

Guide avoids serious injury after being buried in an avalanche: Aspen

North cascades Highway closes due to: Avalanche Risk

How we learn from avalanche near misses: Powder

Big guns are ready for operation Palaci: Rogers Pass

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