25 Jan 2021

January 25, 2021

     YESTERDAY:

      Sunday Jan 24, 2021. Sunrise was at 07:56 Hrs. -8 with a 0-5 KPH NNE breeze. -5 in the valley.

      4 cm of new snow Sunday morning.

      Terrain was open quickly on Blackcomb.

      Challenging light in Sudan.

      Merging!! Busy day on Lower Disease Ridge.

      Thin crust below the new snow. Jan 15 MFcr.

     14:30 Hrs. -6 with a 10-15 KPH East wind. -3 in the valley.

      Satellite image from Sunday afternoon.

      Later in the afternoon.


Weather Observations for January 25, 2021 taken at 06:00 Hours.

2240 meters    -10, Winds were 10-15 KPH SE--Horstman Hut
2180 meters    -10, Winds were 30-40 KPH SE--Whistler Peak
1860 meters      -8, Winds were   5-10 KPH SE --Rendezvous 
1835 meters      -8, Winds were 15-30 KPH ESE--Round House
1650 meters      -6, 4 cm in 12 Hrs, 6 cm in 24 Hrs, Base 224 cm --Pig Alley
1570 meters      -6, 5 cm in 12 Hrs, 7 cm in 24 Hrs, Base 154 cm--Catskinner
  660 meters      -4, Valley Temp, Max temp Yesterday was -2.4, 2.0 mm of precip yesterday.


      As of 07:00 Hrs this am we have obscured skies, variable visibility and snowing lightly.


FORECAST: 

A weak broad upper trough will bring periods of light precip and cloudy skies in a South Westerly flow aloft. The FL will remain below surface.  May even see some patches of blue this afternoon. Low will continue to bring periods of light precip Tuesday with a drying trend and unsettled weather by Tuesday afternoon. More periods of light precip Tuesday night into Wednesday. Unsettled weather with flurries into Friday. Hoping we get 10-15 cm on Saturday. Guesstimates: 4-8 cm by Tuesday am, trace-2 cm by Wednesday am, trace-2 cm by Thursday am. 


      GOES IR image from this am.


       Broad upper trough and associated low will bring periods of light snow today.





      Unsettled weather for Tuesday with cool temps and some flurries. Unsettled in the afternoon.





       More of the same, unsettled weather with flurries.


      AVALANCHE ACTIVITY:

      Two mountain guides die in separate avalanche incidents in Switzerland. Article below.    Net Pic

      A snowboarder has died in an avalanche on Pirin Mountain. Article below.          Bansko Image

      Debris bottom of Fissile. Banana Chute slid 7 days ago according to Hut Custodian. Thea Zerbe Pic

      Activity in past 7 days on Banana & Psycho chute. Fissile.                                       Thea Zerbe Pic

           Debris under Fissile.                                                                                      Thea Zerbe Pic

 Banana Chute slid (according to the Kees and Claire manager 7 days ago) and went BIG - the crown wrapped around 1/2 way across the fan at the runout of Psycho Chute and followed the rock outcropping to the lookers left. I’m gonna say 300m wide? And it kind of looks like Psycho had gone before that. We skied over the beginning of the deposition and it was frozen chunky debris on the fan. 

We skied Banana and it was smooth bed surface, kinda chalky, and the top of the crown started in the “choke” of the chute - seems like right at the elevation where the rain crust would’ve stopped (1900-2000m) off of the entrance at 2300m. The crown was about 30cms deep there but was obviously old and had been blown in a little bit. Softer with a little bit of fresh above the crown.

      Recent glide crack Ne of Oboe, Apostle Trees.                                              Ryan Allderman Image

      Glide Crack < click for explanation.                                                               Ryan Allderman Image


     Some Xc cornice work on Whistler. Sc (ski cut) produced some Sz 1 soft slabs. 

From Sea to Sky Advisory: 

Avalanche Summary

No new avalanches have been reported in the last few days of stagnant weather and generally good stability. Looking forward, new surface instabilities are expected to form as light new snow amounts continue to accumulate. 

Initially problems are likely to take the form of small wind slabs in setting up in the immediate lee of exposed terrain features. This may expand to a more widespread storm slab problem in areas we see accumulations reach 15 or more cm.

Earlier this month, we saw significant deep persistent slab activity, both natural and human triggered. Deep glide cracks have also been observed previously but appear to be holding together in the cool temperatures.


     INFORMATION & OBSERVATIONS:

     Occasional patch of blue in the am.

      Periods of light snow throughout the day.

      AST 1 course with Altus Mountain Guides


      Unsettled weather.

       Lower Disease Ridge.

      New snow made for some good turns.



LOCAL AVALANCHE CANADA MIN REPORTS:

Cloudburst West Route: Jan 24, 2021

ECT: Jan 24, 2021

Gin Peak: Jan 24, 2021


VIDEOS:

Avalanche accident while snowkiting: France

Powder Picker Jan 24, 2021: David Jones


ARTICLES:

Two mountain guides die in separate avalanche accidents: Switzerland

Snowboarder dies in an avalanche on Pirin Mountain: Bulgaria

Deadly weekend in the French Alps: Pistehors.com

An avalanche has killed a snowmobiler in Mortirolo: Italy

Skier who survived Mt Washington, avalanche had no avalanche safety gear: New Hampshire 

Avalanche buries skier at Sundance Ski Resort: Utah

BC's snowpack is above average: Powder Canada



      Marker Goggles for best avalanche picture Jan 19- Jan 31, 2021 in Sea to Sky Area.

      Sponsored by Volkl Canada      

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