1 Apr 2021

April 1, 2021

      YESTERDAY:

      Sunrise was at 06:50 Hrs Wednesday, March 31, 2021. -3 with a 5-10 SE breeze.

      09:00 Hrs. Cloud moved in quickly.

      Early morning light on Whistler Bowl.

      Wednesday March 31, 2021. 14:00 Hrs. +3 with a 5-10 KPH SE breeze.


      Satellite image from the same timeframe as above image.

      Nch'kay < click to read explanation of the aboriginal name for this amazing mountain!!

      Clouds were thickening by 18:30 Hrs.

     Clouds were moving in quickly in the evening.




Weather Observations for April 1, 2021 taken at 06:00 Hours.

2240 meters      -5, Winds were 50-80 KPH SE--Horstman Hut
2180 meters      -5, Winds were 55-70 KPH SE--Whistler Peak
1860 meters      -1, Winds were 30-45 KPH SE --Rendezvous 
1835 meters       0, Winds were  10-30 KPH SE--Round House
1650 meters     +1,  0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 285 cm --Pig Alley
1570 meters     +1,  0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 197 cm--Catskinner
  660 meters     +1, Valley Temp, Max temp Yesterday was +12.2, 0.0 mm of precip yesterday.


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


FORECAST:

A weak upper level shortwave trough will bring periods of very light precip for today in a West-South Westerly flow aloft. The FL is hovering in the 1800 m range this am, should see it slowly drop back down near or at surface tonight. Will likely see moderate winds with the passage of the cold front. Friday will be overcast with some flurries, may see a break in the afternoon. A more vigorous front arrives early Saturday morning with periods of light precip and strong winds. It will leave the area by Sunday am, with unsettled weather in its wake. Drying trend with weak ridging for early next week. Guesstimates: trace-2 cm by Friday am, trace-2 cm by Saturday am, 10-15 cm by Sunday am, trace-1 cm by Monday am.


      GOES IR image from this am.


       Upper level shortwave trough for today with some flurries and unsettled weather.





      West-South Westerly flow aloft.

         Overcast for Friday with a few flurries and a chance of a break in the afternoon. 






       A shortwave trough will bring periods of light precipitation with strong winds Saturday.

.        More vigorous front for Saturday. 


                 AVALANCHE ACTIVITY:

                Update on the cornice collapse-avalanche fatality on Eureka Peak. Article below 


      An avalanche has killed a worker on the Zojilla Pass, Northern India. Article below.  Net File Pic

    Recent wind slab in Squamish Area. MIN report below.                                              Lee Britton Image


     Recent avalanche activity on the Tantalus Range.

      Different perspective of above avalanche, looks like loose to slab?


      Wet loose on Whistler a few Sz 1 on steep rocky east terrain. 

      No new avalanches observed on Blackcomb.


.       Some wet loose activity on Parkhurst Ridge.


From Sea to Sky Avalanche Advisory:

Avalanche Summary

No new avalanche reports by Wednesday afternoon.  

On Tuesday, reports indicated that small loose wet avalanches occurred from steep rocky terrain. Cornices also became weak and failed with daytime warming. No slabs were reported from the slopes below. 

Wind slabs may be reactive to human triggering on wind-loaded slopes at upper elevations. Cornices are fragile and pose a threat from above and below. 

Snowpack Summary

Up to 40 cm of snow fell throughout the region since the weekend. This was accompanied by strong southwest winds that switched to the northwest. Reactive wind slabs could be lingering on a variety of aspects at upper elevations, especially where they sit above a crust. 

The recent snow sits above a variety of old snow surfaces comprising mostly of a widespread melt-freeze crust with the exception of high north-facing terrain where it may be sitting on small surface hoar crystals. A melt-freeze crust exists at treeline and an isothermal trend exists below 1100 m.

Cornices along ridgelines are large, and the likelihood of them failing will increase when the sun comes out.


      INFORMATION & OBSERVATIONS:

      Stratus layer in the valley early Wednesday morning. -6 with a 15-20 KPH SW wind. Did go N!

      Just a few clouds looking South West in the am.


      The Cheakamus River is clear.


     Wednesday had high thin cloud in the pm.


      We do have serious Peaks in the Sea to Sky!!


FROM SEA TO SKY MIN REPORTS:

Small Slope Wind Slab: March 29, 2021

Sky Pilot: March 30, 2021


VIDEOS:

Wet snow in the Bridgers: Montana

Powder Picker March 31, 2021: David Jones


ARTICLES:

An avalanche has killed a road worker near Zojilla Pass: Northern India

Update from MIN report on avalanche fatality at Eureka Peak cornice collapse: March 29, 2021 

Others in the Heli-Ski group witnessed the avalanche that buried a Fairbanks Skier: Matanuska Glacier

Youth safely returned from camp after avalanche highway closure: South Klondike Highway

Avalanche report and incidents from: Austria



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Mike Dempsey
604-932-5550
Your representative in Canada and the United States for ATMRECYCYCLINGSYSTEMS.COM and VORTEXDEPOLLUTION.COM in Canada

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