22 Nov 2021

November 22, 2021

      PAST FOUR DAYS:

     Thursday November 18, 2021. 12:00 Hrs. -5 Deg C at 1835 m. Snowing lightly.

      Friday November 19, 2021. 12:00 Hrs. -2 Deg C at 1835 m.

      Saturday November 20, 2021. 13:00 Hrs. -5 Deg C at 1835 m.

      Sunday November 21, 2021. 12:00 Hrs. -2 Deg C at 1835 m


Weather Observations for November 22, 2021 taken at 06:00 Hours.

2180 meters      -4, Winds were 40-85 KPH S--Whistler Peak 
1835 meters       0, Winds were  30-65 KPH SE--Round House
1650 meters     +2,  0 cm in 12 Hrs, 0 cm in 24 Hrs. Base 100 cm? --Pig Alley
  660 meters      -3, Valley Temp, Max temp Yesterday was +2.9, 0.0 mm of precip yesterday

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


FORECAST:

An upper level trough and associated cold front will move in this am in a Westerly flow aloft. The freezing level is hovering below surface with warm air aloft between 1800 -1000 m,  hopefully dropping to around 800-900 m later today. Expecting periods of light precipitation to start soon, continuing into early Tuesday am. Should see a break in the weather Tuesday am/pm, weak ridging with dry unsettled weather & slightly cooler.  Likely some sunny breaks in the mix. Another front should arrive Wednesday am with periods of light to moderate precipitation into Thursday. Looking like it warms up Thursday afternoon at this time (FL 1800 m), precipitation easing off Friday, with another warm front  Saturday with a wet, warm, & windy storm. The Freezing level may spike to 2500 m Saturday. Active weather for the weekend into early next week.  Lots can happen between now and then, so stay tuned for an update on Wednesday.                    

Guesstimates: 12-18 cm by Tuesday am, 1-3 cm by Wednesday am, 15-25 cm by Thursday am, 20-40 cm by Friday am above 1800 m.


      Image from this am.

      Add some colour.


      Low sending a cold front today with seasonable temperatures at 1600 m.






      Westerly flow aloft.


           High pushing back, weak ridging with a mix of sun and cloud Tuesday.






      Low will send precipitation our way Wednesday with a warmer flow.

      Storm day with moisture out of the Southwest Wednesday.

      Storm continues into Thursday.



      AVALANCHE ACTIVITY:

      From Friday on Horstman GlacierThere was a good mid storm Na cycle.                                      Tony Sittlinger Pics


    Wide spread SH on 10ish of dry loose over a fairly supportive slab on a 4F df layer; no repeatable compression results.

     Old debris from Na cycle last storm. Images taken on Friday Nov 19, 2021.  2m to ice in above image.  TS Pic

     Below Horstman Hut.  Great coverage for this early in the season.                                                          TS Pic

     Old wet avalanche debris near Goat Mountain, from last event.                       
Al Collis Pic

      N & E aspects around 1800 m.                                                                             Al Collis Pic




              

      INFORMATION & OBSERVATIONS:

     Snowing at 660 m on Thursday am. High in the valley of -1 Deg C.

      Break in the weather just before sunset Thursday. High in the valley Thursday was +2.

      Sunrise Friday, 07:32 Hrs. -7 Deg C at 2240 m.

      Armchair Friday afternoon. 

     Weak/Moderate AR to our North Saturday am.

      Saturday am, moisture to our East. 

     Saturday sunrise 07:33 Hrs. Image from same time frame as above image. -5 at 1835 m.

      Sunday sunrise 07:35 Hrs. -3 Deg C at 1835 m.


      Sunday am, is that a river or an ocean??!!!

      Mount Currie Sunday afternoon. High in the valley Sunday was +2.9 Deg C.






     FROM SOUTH COAST TOURING:


     Thanks Conny for the pics and intel.                                                             Conny Amelunxen Pics

Here is a picture (taken from the air) of a slope on the south ridge of Elliot Peak, just to the east of Mt Rohr yesterday. Maybe some of those snow gurus out there can explain what's happening? I would love to hear some different thoughts on this. If I really needed to get to that ridge at the top what's the best way up there through this slope?

      There was an active cycle in the last storm.                                                  Conny Amelunxen Pic

.       Glide Crack release likely trigger? Slab release to the L & R? There are different possibilities!



LOCAL MIN REPORTS:

Avalanche, Mount Currie: Nov 19, 2021

Ronayne: Nov 20, 2021

Metal Dome: Nov 20, 2021

Metal Dome Glacier: Nov 21, 2021


VIDEOS:

Buried-1982 Alpine Meadows Avalanche:  Trailer


ARTICLES:

Early Season Safety Equipment Checks: NWAC

Preliminary satellite derived snow avalanche assessment: Nepal

Snow cornice & snow avalanche monitoring using automatic time lapse cameras: Tasiapik Valley 2017-2018

Avalanche deposit volumes by avalanche path morphology: Cryosphere

Austria to go into full lock down, ski resorts closing: Planet Ski


ARVA 25 Ultra Light Air bag for sale. $900 + Taxes. E Mail atmrecycling@gmail.com. Not right pic.

      Marker Flexible Touring Goggles up for grabs. Send best avalanche shot to win. Nov/Dec.                                                                                           wwflann@me.com


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