29 Mar 2021

March 29, 2021

      YESTERDAY:

     Sunrise Sunday was at 06:57 Hrs. -4 with a 20-60 KPH SE.

      Winds in the morning at 1860 meters were 40-85 KPH.

      There were some nice turns to be had below tree line in the am.

      Difficult visibility in the alpine. Obscured skies and blowing snow.

      Snowing and blowing.

      Sunday March 28, 2021. -4 with a 20-75 KPH ESE wind. +2 in the valley.

      Goes satellite image from same timeframe as above image. 

      Snowing and blowing in the pm as well.

      Breaks by 15:00 Hrs with convective flurries later in the afternoon.

      Nice turns to be had at the end of the day.


Weather Observations for March 29, 2021 taken at 06:00 Hours.

2240 meters    -14, Winds were 20-35 KPH N--Horstman Hut
2180 meters    -14, Winds were 20-35 KPH N--Whistler Peak
1860 meters    -12, Winds were   5-10 KPH N --Rendezvous 
1835 meters    -11, Winds were  15-25 KPH W--Round House
1650 meters    -11,  5 cm in 12 Hrs, 15 cm in 24 Hrs, Base 294 cm --Pig Alley
1570 meters    -10,  7 cm in 12 Hrs, 15 cm in 24 Hrs, Base 208 cm--Catskinner
  660 meters      -7, Valley Temp, Max temp Yesterday was +3.8, 18.4 mm of precip yesterday.


      As of 07:00 Hrs we have a few scattered clouds and unlimited visibility.




FORECAST:

A building ridge of high pressure will bring sunny skies for today in a Northerly flow aloft. The FL may spike at 1000 meters today with some daytime heating, dropping back to surface tonight. Chance we might see some convective cloud development this afternoon. Tuesday will bring mostly sunny skies with some cloud in the mix as well. A low moving down the coast will send clouds our way on Wednesday for an overcast dry day. A weak trough arrives for Thursday with periods of light precip. Cloudy on Friday. Guesstimates: 0 cm by Tuesday am, 0 cm by Wednesday am, 0 cm by Thursday am, 1-5 cm by Friday am.


      GOES IR image from this am.


      High pressure strengthening today with sunny skies.





      North-North Westerly flow aloft.

        High pressure for Tuesday with some cloud in the mix. Seasonal temps.





        Low to the North will send cloud our way for Wednesday.

      Think it will be cloudy on Wednesday.

           

       AVALANCHE ACTIVITY:

      An avalanche has killed a skier near the Matanuska Glacier. AK. Article below.                  Net Pic

       Recent slab avalanche in Montana.


      Sr yesterday on Paul Ridge. MIN report below.                                                       James Keevel Pic

      Sz 1.5 Sc yesterday, MIN report below.                                                                    Fisalestone Pic


      Avalanche mitigation on Blackcomb yesterday produced some Sz 1-1.5 Xe.

      Avalanche mitigation on Whistler yesterday produced many Sz 1-Sz 2 Xe Xc.

From Sea to Sky Avalanche Advisory:

Avalanche Summary

The likelihood of triggering avalanches will decrease somewhat in the wake of Sunday's storm, however, human triggering remains likely, especially in wind loaded areas at upper elevations. With so much new snow, even short periods of direct sun can trigger natural avalanches. Cornices are large and should be given a wide berth, especially when the sun comes out.

It is likely that a natural avalanche cycle occurred during the day on Sunday.

Snowpack Summary

20-40 cm of new snow fell throughout the region since Saturday night. This sits above a widespread melt-freeze crust, with the exception of high north-facing terrain. It may also be sitting on small surface hoar crystals reported on north and east aspects in the alpine. This recent precipitation likely fell as rain in many areas below treeline. The snow surface has likely frozen into a crust at lower elevations.

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



     INFORMATION & OBSERVATIONS:

      Moist snow below 1500 meters in the am, some pinwheeling.

      Strong winds were moving the snow around in the alpine.

      Strong winds and blowing snow kept some lifts from operating.

       Flow switched Northerly in the afternoon with cool air.

      Lower cruiser melted very quickly.


      Moist day in the village, +2 at 14:30 Hrs.

     Buy 14:30 Hrs the new snow at catskinner measured 8 cm, 19 cm in 24 hrs. Base 208cm.

      Nice break later in the pm.


FROM SEA TO SKY MIN REPORTS:

Paul Ridge N Fully: March 28, 2021

Winter isn't over yet: March 28, 2021

Mt Sproatt: March 28, 2021


VIDEOS:

Powder Picker March 28, 2021: David Jones


ARTICLES:

A skier has died in an avalanche on the Matanuska Glacier: Alaska

Helicopter crash in Alaska kills 5, sole survivor in critical condition: Kink Glacier

A ski tourer was fully buried but recovered near Neustift: Austria


       Submit your best avalanche photo for a pair of Goggles March 1-31, 2021. Sea to Sky Area.

                                                    Thanks to Volkl Canada for sponsoring.

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