14 Mar 2021

March 14, 2021

     YESTERDAY:

      Sunrise Saturday was at 06:29 Hrs. +1 with a 15-25 KPH ESE wind.

      Ipsoot Early morning light.

      Lenticulars were forming early in the am.

      Groomers were exceptionally nice in the am.

      Looking North Saturday am.

     Wind blown snow over Horstman Glacier.


      Saturday March 13, 2021. 14:00 Hrs. 0 Deg C with a 20-35 KPH Se wind. +10 in the valley.


      Satellite image from same timeframe as above.

      If you like clouds it was a great show.


     After closing.

.       Later in the afternoon. Next front brewing to the South West.


Weather Observations for March 14, 2021 taken at 06:00 Hours.

2240 meters      -7, Winds were 100-160 KPH SE--Horstman Hut
2180 meters      -7, Winds were  85-115 KPH E--Whistler Peak
1860 meters      -4, Winds were    35-60 KPH SE --Rendezvous 
1835 meters      -4, Winds were    25-60 KPH ESE-Round House
1650 meters      -2,  ?trace in 12 Hrs, trace in 24 Hrs, Base 267 cm --Pig Alley
1570 meters      -2,  trace in 12 Hrs, trace in 24 Hrs, Base 192 cm--Catskinner
  660 meters     +6, Valley Temp, Max temp Yesterday was +12.5, 0.0 mm of precip yesterday.
Will update ASAP.

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



 FORECAST:

A cold front will arrive this am with light precipitation and strong winds in a Southerly flow aloft. The FL will hover in the 1200-1000 m range this am, slowly dropping to surface by tonight with the passage of the cold front. Monday will see a mixed bag of weather, flurries in the early am with weak ridging bringing unsettled weather by day break, with the ridge strengthening by the afternoon with sunny weather. Weak ridging on Tuesday will bring a mix of sun and cloud. Wednesday will see dry overcast skies as the next in a series of fronts begin to push down the coast. Thursday is looking like a storm day with light-moderate precip, moderate winds and seasonal temps. Guesstimates: 18-22 cm by Monday am, trace-1 cm by Tuesday am, 0 cm by Wednesday am, 2-6 cm by Thursday am, 30-35 cm by Friday am.


      GOES IR image from this an.


      Cold front will arrive this am with wet windy weather.





      Southerly flow aloft.


       Ridge slowly builds on Monday with a mixed bag of weather.





     Low to the North with weak ridging for our zone on Tuesday. Mix of sun and cloud, mostly cloudy.



      AVALANCHE ACTIVITY:

       An avalanche has killed a man on Mt Norikura, Japan. Article below.                                Net Pic


      Older significant avalanche activity on North face of Face Mountain, from last storm cycle.

       Serac collapse on Overlord Glacier. Photos taken on Saturday March 13, 2021.

      That is a lot of Scotch ice.

     Slid a long way.

      Would not want that chasing me down the hill!!

      Lakeside Bowl was closed Saturday afternoon.

      Pin Wheeling in Lakeside Bowl.

     New wet loose in Lakeside Bowl.


     New wet loose in Bony Basin.

     On Whistler, Sz 1 Na/Sc wet loose. Xc Sz 2.5 Glacier Cirque. Cornice control.


From Sea to Sky avalanche advisory:

Avalanche Summary

Loose wet activity and some cornice failures have likely occurred in the past few days from spring-like conditions. Looking forward, storm and wind slabs are likely to be triggerable on Sunday as they build during and after the storm. Loose wet avalanche activity may continue below the rain-snow line.

Snowpack Summary

A storm will impact the region on Sunday, bringing snow above around 1000 m, and rain below. Storm slabs are expected to form over the day. Strong south wind will form wind slabs in exposed lee terrain features at treeline and alpine elevations. The snow will fall onto previously wet or crusty snow except at high elevation northerly aspects, where it should fall onto wind-affected snow in exposed terrain or perhaps small surface hoar crystals in sheltered terrain. Cornices have been reported as being massive and fragile.


      INFORMATION & OBSERVATIONS:

.       Spindrift Saturday am, 50-80 KPH winds at 2240 meters.

     We do lose a significant amount of snow through Sublimation < click for explanation!!


     You can trim them back with explosives, but they do regrow.

.       Slipping very slowly.

      That is a cool suit.

      The backcountry was a busy place.

     No new snow yesterday, base was 193 cm at 14:30 Hrs, at 1570 meters.


      Recent Profile.



FROM SEA TO SKY MIN REPORTS:

Spring in the sun: March 13, 2021


VIDEOS:

SpotWx and Models in the Mountains: David Jones


ARTICLES:

1 feared dead in Mt Norikura avalanche: Central Japan

Why avalanche deaths are on a record pace this season: Forbes

Illuminating the science of snow, from how it helps sustain communities to what makes it fun for skiers: Ned Rozell


       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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