20 Mar 2021

March 20, 2021


     Sunrise was at 07:16 Hrs Friday. -5 with a 15-35 KPH ESE wind.

     Snowline below 1000 meters on Friday.

      Dumping in the alpine.

      Awesome turns to be had.

      Everyone was having a good time.

      Thin cloud cover at times.

      Friday March 19, 2021. 14:00 Hrs. -4 with a 20-45 KPH ESE wind.

      Satellite image from the same timeframe.

     18:00 Hrs. -5 with a 20-35 KPH ESE wind.

Weather Observations for March 20, 2021 taken at 06:00 Hours.

2240 meters      -7, Winds were 30-40 KPH SE--Horstman Hut
2180 meters      -6, Winds were 25-40 KPH S--Whistler Peak
1860 meters      -5, Winds were 15-25 KPH SE --Rendezvous 
1835 meters      -5, Winds were 10-20 KPH SE--Round House
1650 meters      -3,  8 cm in 12 Hrs, 21 cm in 24 Hrs, Base 298 cm --Pig Alley
1570 meters      -3,  7 cm in 12 Hrs, 16 cm in 24 Hrs, Base 211 cm--Catskinner
  660 meters       0, Valley Temp, Max temp Yesterday was +4.5, 4.4 mm of precip yesterday.

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


A weak upper trough will push through with cloudy weather and some isolated flurries in a South West flow aloft. Chance we may see a sunny break this afternoon. The FL will hover around surface possibly going as high as 1000 meters. A cold front arrives on Sunday with periods of light precipitation with the FL rising to around 1000 meters. Precip will ease off early Monday morning with some ridging expected with a mix of sun and cloud. Tuesday another weak frontal band will bring periods of light precip to the area with seasonal temps. A more active front arrives for Wednesday with light/moderate precip. As of now it looks like we will see a drying trend with ridging for Thursday through Saturday. Snow is in the long range forecast for Sunday. Guesstimates: 0-2 cm by Sunday am, 12-18 cm by Monday am, 0-trace by Tuesday am, 4-8 cm by Wednesday am, 25-30 cm by Thursday am.

      GOES IR image from this am.

       A weak upper trough will bring cloudy weather with cool temps and scattered flurries.

      South Westerly flow aloft.

      Cold front arrives Sunday with the FL rising to 1000 meters. Light precip.

      High pushes the low further North with unsettled weather for Monday.


        A cornice drop left an individual with a Fx lower limb on Mt Duke. Sorry not much intel.

                   An avalanche flows through Chitral Village with no injuries. Article below.

      On Blackcomb AC produced numerous mostly Sz 1 soft slabs on steep lee terrain Xe Xl Sr Sc.

     On Whistler AC produced Sz 1-2 soft slabs, 20-60 cm Xe Sc Sa Xc.

From Sea to Sky avalanche advisory:

Avalanche Summary

Storm slabs were actively growing throughout the day on Friday and will continue to grow overnight. Preliminary reports from Friday suggest the new snow was showing signs of being very reactive, with numerous size 1-2 human and explosive triggered avalanches (30-60 cm thick). Natural avalanches are likely overnight and then as the storm eases on Saturday morning the new snow will be primed for human triggering.

Over the past week there have been a few large isolated avalanches west of Hwy 99 including one on Cloudburst Mountain (see here) and two near Mt. Fee (see here and here). These avalanches may be due to extensive wind loading forming thick wind slabs, but they may also be associated with isolated weak snow from earlier this season.

Snowpack Summary

New snow amounts between Thursday and Saturday morning are expected to total 30-50 cm, with the largest amounts west of Hwy 99. Strong wind will shift from the south to the west, and likely form extra thick slabs in lee terrain. The new snow will overlie a melt-freeze crust up to roughly 1600 m and higher on sun-exposed slopes or dry snow on northerly aspects at high elevations. The bond of the new snow to this interface is suspect, and it may take more time than usual for storm slabs to stabilize.

Around 150 to 300 cm of consolidated snow may overly sugary faceted grains formed earlier this season. These layers are expected to be spotty around the region and we haven't received conclusive evidence of them being the culprit of avalanche activity. That being said, it is possible they may be associated with a few recent large avalanches around the Whistler area.

Remember that cornices along ridgelines are large at this time of year and always have the possibility of failing naturally or from the weight of a human.


       Snowing all morning, a bit of a break in the afternoon before more snow.

      Awesome snow on North facing aspects.

      Considerable on Friday.

      Lots of keeners going into Blackcomb Glacier.

      Spanky's was not as popular.

      Secret Chute


No new MIN reports as of 07:00 Hrs this am.


Powder Picker March 19, 2021: David Jones


Avalanche flows through Chitral Village: Pakistan

Spring Equinox: March 20, 2021

What we can learn from the smallest most vulnerable glaciers in the Otztal Alps: Cryospheric Sciences

Whistler Blackcomb unveils spring plan: Pique

Avalanche drill was held at Ladik Akdag Ski Center: Turkey

WANTED any transceiver either working or not

$150 reward for trading in on a new Arva Neo Pro at $499 
$100 reward for trading in any transceiver in on an Evo 4 at $329 or Evo 5 at $385

Mike Dempsey
Your representative in Canada and the United States for ATMRECYCYCLINGSYSTEMS.COM and VORTEXDEPOLLUTION.COM in Canada

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