18 Apr 2021

April 18, 2021

      YESTERDAY:

      08:00 Hrs. +6 Deg C at 660m. +7 at 1650m. +8 at 1835m. +7 at 2140m.

     Wet loose-slab climax avalanche on Joffre.

      We do live in an amazing part of the world.

      Phalnax Ridge.

      Older turns, not many people out and about Satuday am.



     14:00 Hrs. +24 Deg C at 660m. +16 at 1650m. +12 at 1835m. +7 at 2180m.


      Satellite image fro the same timeframe as above image.

     20:00 Hrs. +10 Deg C at 660m. +8 at 1650 m. +8 at 1835 m. +7 at 2180 m.

     New wet slab noted Saturday evening on Parkhurst Ridge.


Weather Observations for April 18, 2021 taken at 06:00 Hours.

2180 meters     +6, Winds were 10-15 KPH SW--Whistler Peak 
1835 meters     +6, Winds were   5-10 KPH SE--Round House
1650 meters     +3,  0 cm in 12 Hrs, 0 cm in 24 Hrs, Base 254 cm --Pig Alley
  660 meters     +1, Valley Temp, Max temp Yesterday was +24.4, 0.0 mm of precip yesterday.


      Sunrise was at 06:12 Hrs, high scattered cloud and unlimited visibility.


FORECAST:

The upper ridge will bring mostly sunny skies and warm temperatureas to the area in a Northerly flow aloft. Slightly cooler than yesterday with some high clouds in the area this am. Will see a transition from off shore flow to onsshore flow sometime during the day. High scattered cloud should disipate later as the sun gets stronger. The FL will continue to remain well above the local peaks with some minor crust recovery expected. Monday and Tuesdasy are looking sunny. Some cloud in the mix for Wednesday. Sunny on Thursday, with some clouds moving in later on Friday. Some wet weather for the weekend. Would be nice to give the forest a drink. May get another quick powder reset for next Monday. Enjoy the unbelievable sunny weather. 


      GOES image from this am.


       Deep low but the high remains the dominat force.




     Northerly flow aloft.


         High continues to be the dominant force with sunny skies for Monday.





       High still in control for Tuesday.

.       Slowly changing, could see some cloud and cooler temps by Wednesday.


     AVALANCHE ACTIVITY:

     Wet loose to wet slab on Joffre.

             Sz 1-2 wet loose on most solar aspects in the Sea to Sky Corridor.

      Mix of wet snow and dirt.

      Wet loose to wet slabs.

      Point releases to slabs.

      Point release to slab to deeper slab.

     Glide Cracks.

      Wet point releases Garibaldi Park.

      Wet climax avalanche in the Callaghan Valley, below tree line.                               Brad Sills Image





From Sea to Sky Avalanche Advisory:

Avalanche Summary

There have been several solar triggered wet loose avalanches reported in recent days, up to size 2.5, on solar aspects. There have also been a number of cornice failures reported over the past week.

Looking forward, wet loose avalanches and cornice failures are expected to continue with sun and warm temperatures. The likelihood and potential size of these increases when temperatures do not dip below freezing overnight, and avalanche activity will likely begin earlier in the day with each subsequent warm day.

Wind slabs may still be possible to trigger on high elevation north aspects.

Snowpack Summary

High overnight freezing levels mean that the snow surface remains moist or wet in many areas. In places where the surface forms a crust overnight, it should quickly soften during they day with sunshine and warm temperatures. The highest elevation north aspects may still hold soft snow or wind slabs.

Cornices are large and looming along ridgelines. Sun and warm temperatures will increase the chances of cornice failures, especially when temperatures remain above zero overnight.



      INFORMATION & OBSERVATIONS:

      +2 in the Pemberton Valley Saturday am. High on Friday was +27.6 Deg C.

      Was an amazing day to check out the Sea to Sky Corridor.

.      Meager Area.


      Surprised at how few cornices have collapsed, still time!!

      Looking down Howe Sound.

      Extra Long Cornice.

     Table Top Mountain.


FROM SEA TO SKY MIN REPORTS:

North Ridge of Duffey Lake: April 16, 2021


VIDEOS:

Wet Slab Avalanches: UAC


ARTICLES:

An avalanche has killed one, seriously injuring another ski tourer on Grober Zunig: Austria

Officals say wind may cause avalanches in Central Wasatch: Utah

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