26 Mar 2021

March 26, 2021

      YESTERDAY:

      Sunrise on Thursday was at 07:03 Hrs. -5 with a 5-15 KPH North breeze.

      Clouds eventually dispersed. 

     Another awesome day with dry snow on North aspects.

     More blue than cloud for part of the day.

      Cloudier in the afternoon.

      Clouds were building to the South.

     There were some good turns to be had.

     Thursday March 25, 2021. 15:00 Hrs. +1 with a 10-20 KPH West wind. +9 in the valley.

      Satellite image from the same timeframe as above image.

      18:00 Hrs, nice light near days end.


Weather Observations for March 26, 2021 taken at 06:00 Hours.

2240 meters      -7, Winds were 25-30 KPH SW--Horstman Hut
2180 meters      -7, Winds were 25-30 KPH SSW--Whistler Peak
1860 meters      -6, Winds were 15-20 KPH SE --Rendezvous 
1835 meters      -5, Winds were  10-20 KPH S--Round House
1650 meters      -5, 0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 275 cm --Pig Alley
1570 meters      -5, 0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 195 cm--Catskinner
  660 meters     +2, Valley Temp, Max temp Yesterday was +11.2, 0.0 mm of precip yesterday.



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


FORECAST:

A weak upper ridge will bring unsettled weather for today in a Northerly flow aloft. A mix of sun and cloud with the FL spiking at around 1400 meters dropping down to 700 meters tonight. Will get cloudier tonight and into Saturday morning with a vigorous warm front arriving around Saturday at noon with steady light precipitation becoming moderate early Sunday morning. Hoping the FL remains below 1500 meters on Saturday. The cold front on Sunday will bring light to moderate precip with strong winds and cool temperatures. The ridge rebuilds for Monday in to Wednesday of next week. Guesstimates: 0 cm by Saturday am, 22-28 cm by Sunday am, 20-30 cm by Monday am.


      GOES IR image from this am.


        High will bring unsettled weather for today with a mix of sun and cloud.





      Northerly flow aloft.

        Front arrives Saturday afternoon.





       Low will send precip our way Sunday with cool temps and strong winds.


     Still looking good for Sunday.


     AVALANCHE ACTIVITY:

      An avalanche has killed 5 people in Sargan Village, Pakistan. Article below.                    File Photo

      Cornice drop producing a small slab. MIN report below-- Rutherford.                     Forecaster Pic


      No new avalanches observed on Whistler, Sz 1.5-3 Xc yesterday. Several cornice control results.

      Cornice control on the Horseshoes.

      No new avalanches observed on Blackcomb. Old cornice debris in Blackcomb Bowl.

       Large cornice chunks.

      Some wet loose on solar aspects below tree line.

     Recent Fx line in Austria, two ski tourers were injured.


From Sea to Sky Avalanche Advisory:

Avalanche Summary

A few cornices were triggered naturally and from explosives on Tuesday and Wednesday. They were very large, as is expected at this time of year.

Looking forward, wind slabs and cornices may remain triggerable at higher elevations and use caution on sun-exposed slopes if clear skies prevail.

Snowpack Summary

Around 5 to 10 cm of snow accumulated Tuesday night, with strong wind from the southwest switching to northeast. New wind slabs likely formed during this time, which may linger in steep, alpine terrain features. This snow adds to the 30+ cm that accumulated on the weekend. All of the new snow sits above a widespread crust, with the exception of high north-facing terrain. Observations suggest the snow has bonded well to these old interfaces. There are currently no concerning weak layers in the snowpack, although a spotty early season facet layer deep in the snowpack could return as a problem later in the season.

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.



      INFORMATION & OBSERVATIONS:

     By 08:00 Hrs clouds began to disperse. 

      Some spindrift in the am.

      Busy day in the backcountry.

      New places to get air.

      Some dark clouds but no convective flurries yesterday.


      There is a lot of cornice debris out there, caution should be taken in flat light or when it snows.

      Blackcomb Bowl


FROM SEA TO SKY MIN REPORTS:

The Rutherford Delivers: March 25, 2021


VIDEOS:

Whistler Powder Picker, March 25, 2021: David Jones


ARTICLES:

An avalanche has killed 5 people in the Neelum Valley: Pakistan

Lack of jurors prompts mistrial in Colorado case against snowboarders: Summit County

ENSO-Current Status and Predictions: NOAA

La Nina>ENSO Neutral in April: NOAA


       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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