13 Apr 2021

April 13, 2021

      YESTERDAY:

      08:00 Hrs. +1 at 660 m. -6 at 1650 m.

     10:00 Hrs. +5 at 660 m. -2 at 1650 m.

     12:00. 0 Deg c at 1650 m.

      Wet loose activity bottom Left.

      Rumbling Glacier.


     14:00 Hrs. +10 at 660 m. +2 at 1650 m.

      Satellite image from same timeframe as above image.


     High in the valley yesterday was + 11.5 Deg C.   At 18:00 Hrs, +1 at 1650 meters.


Weather Observations for April 13, 2021 taken at 06:00 Hours.

2180 meters      -9, Winds were 25-45 KPH ENE--Whistler Peak 
1835 meters      -6, Winds were   5-15 KPH ENE--Round House
1650 meters      -6,  0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 281 cm --Pig Alley
  660 meters      -4, Valley Temp, Max temp Yesterday was +11.5, 0.0 mm of precip yesterday.


       As of 06:22 Hrs, sunrise we had clear skies and unlimited visibility.


FORECAST:

Upper level ridging will bring mostly sunny skies in a North Easterly flow aloft. The FL will spike to around 2000 meters today, dropping back down to surface tonight. Thought it would be a bit warmer this morning , but not the case. Warmer air will slowly creep into the area as the week progresses. No real change until next Monday, we might see some clouds roll into the area, but more on that later. Temperatures will continue to creep up in the valley, possibly reaching 20 Deg on Saturday. Freezing levels will continue to reach higher elevations as the week carries on. Enjoy the sun.


      Satellite image from this am.


       Upper level ridge for today, some offshore flow over our zone. 





       North Easterly flow aloft.

.       High pressure for Wednesday, slightly warmer!






       High shifting inland with warmer temps on Thursday.



     AVALANCHE ACTIVITY:

      Sa Watersprite Lake Sunday, MIN report below.                                                              NU22 Image


     Wet loose on the lower elevations on Tantalus Range.

     Older, likely Saturday storm slab debris.

     Wet Loose on Brohm Ridge.



From Sea to Sky Avalanche Advisory:

Avalanche Summary

There have been several size 1-2 natural and human triggered storm and wind slab avalanches reported over the past few days. These were mainly on northerly aspects in the alpine and at treeline. There have also been several reports of cornice failures, and small wet-loose avalanches.

Looking forward, wind slabs are still possible to trigger at upper elevations, and wet-loose avalanches are expected with sun and warm temperatures. The likelihood of cornice failure also increases with warming.

Snowpack Summary

A storm late last week brought anywhere from 10-30 cm of new snow. The snow surface is now likely a crust in most areas, except on north aspects above about 1400 m where both soft snow and wind slabs may exist. In areas where the surface is a crust, sunshine and rising freezing levels are expected to soften the crust during the day.

Cornices are large and looming along ridgelines. Their release is unpredictable, requiring a large berth if you're travelling above or below them. Forecast rising freezing levels will increase the chances of cornice releases.


      INFORMATION & OBSERVATIONS:

      Early Monday am, evidence of some wet loose activity. Awesome looking morning!!

      Blackcomb Bowl


      Weekend Chutes


     Not sure if I have ever seen this many tracks on the Tantalus Range.

      There are some very large cornices out there. Be wary with the progresive warming this week.

      Steep Lines




FROM SEA TO SKY MIN REPORTS:

Sa Watersprite Lake: April 11, 2021

Lyall Style Couloir: April 11, 2021

Rainbow: April 12, 2021



VIDEOS:

Destructive wet snow avalanches: Mar 22, 2019

Wet snow avalanches: March 15, 2013


ARTICLES:

Staying safe from avalanche danger: Washington State

BD announces voluntary recall for Pieps DSP Beacons with Neoprene Case: Teton Gravity Logic

If your Black Diamond Avalanche Transciever was recalled, here is your fix: SKI

The future of skiing is digital, says Vail CEO: Bloomberg

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