15 Mar 2021

March 15, 2021

      YESTERDAY:

      Sunrise was at 07:27 Hrs Sunday. -3 with a 25-50 KPH ESE wind.

     As of 08:00 Hrs at 2240 meters, -6 with 100-150 KPH SE wind.

     10:00 Hrs. Snowing 2 cm per hour, -3 with a 15-25 KPH ESE wind.

      12:00 Hrs. -4 with a 30-70 KPH ESE wind.

      Snow line 14:00 Hrs at 1100 meters.


      Sunday March 14, 2021. 14:00 Hrs. -3 with a 20-50 KPH ESE wind. +3 in the valley.


      Satellite image from same timeframe as above image.

      Snowing in the afternoon.

      Raining in the valley at 15:00 Hrs.

      Started drying out by 19:30 hrs. 



Weather Observations for March 15, 2021 taken at 06:00 Hours.

2240 meters    -12, Winds were 15-25 KPH N--Horstman Hut
2180 meters    -11, Winds were 10-20 KPH N--Whistler Peak
1860 meters    -10, Winds were   5-10 KPH N --Rendezvous 
1835 meters      -9, Winds were   5-10 KPH NW--Round House
1650 meters      -7,  7 cm in 12 Hrs, 18 cm in 24 Hrs, Base 280 cm --Pig Alley
1570 meters      -7,  5 cm in 12 Hrs, 12 cm in 24 Hrs, Base 204 cm--Catskinner
  660 meters      -1, Valley Temp, Max temp Yesterday was +7.2, 6.8 mm of precip yesterday.


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



FORECAST:

An exciting upper low will be moving through early this am, with a ridge of high pressure building in its wake. The upper flow will be Northerly.  The FL will spike at around 1000-1200 meters dropping back down to surface tonight. Sunny conditions will persist for most of the day. Tuesday will be unsettled with a mix of sun and cloud in a Westerly flow aloft. Wednesday is looking overcast but dry as the next front moves closer to the area. Thursday will see a front push through with steady light/moderate precip with the FL rising to around 1500 meters. A series of weak frontal waves will be with us into the weekend. Guesstimates: 0-trace by Tuesday am, 0 cm by Wednesday am, 0 cm by Thursday am., 25-30 cm by Friday am, 8-12 cm by Saturday am.


      GOES IR image from this am.


       Ridge of high pressure building today with sunny skies.





    Northerly flow aloft.

      Low to the North will send some cloud our way to mix in with the ridge for Tuesday.





      Low off the coast will send cloudy skies our way on Wednesday.

.       Low over the Pacific.


      AVALANCHE ACTIVITY:

       Avalanche on approach to Armchair Glacier, MIN report below.                            Findscarns Pic                    

     Wet Avalanche on the Duffey. MIN report below.                                                 Casey Ingstrom Pic

      Mount Fee avalanche from a couple of days ago. MIN report below.                  JLaboucane Pic


      Sz 1  behind Mount Fee on Saturday. No involvement.                                        Peter Winter Image


      Control measures on Whistler Sunday Sc Sz 1.5 touchy soft slabs in the am, alpine closed.

      No new avalanches observed on Blackcomb. Apine closed.


From Sea to Sky avalanche advisory:

Avalanche Summary

Storm slabs were reported as being touchy on Sunday, with slabs around 10 to 20 cm thick. Wind slabs were likely touchy at higher elevations too, but limited observations were made due to extreme wind. Looking forward, wind slabs could still be triggered by riders on Monday. Sun-exposed slopes and cornices will also weaken during daytime warming.

Snowpack Summary

Around 10 to 20 cm of snow fell in the region on Sunday, likely forming storm slabs in sheltered terrain and wind slabs in exposed leeward terrain at treeline and alpine elevations. The snow overlies previously moist snow or a hard crust in most areas except for high-elevation northerly aspects, where it fell on previously wind-affected snow. Sun-exposed slopes may moisten on Monday if clear skies prevail. Cornices will also weaken in the sun.



     INFORMATION & OBSERVATIONS:

      Limited visibility in the alpine Sunday morning. Blowing snow and overcast skies.

     Raining in the valley for upload.

     Alpine lifts remained closed all day on Sunday.

      The elusive spotted raven!

      Warmer temps and extra load created this roof avalanche.

     This was on March 13, 2021. 


      Raining in the valley most of the day. 6.8 mm recorded on Sunday.

      By 14:00 Hrs at 1650 meters we received 11 cm of new snow with a 277 cm base.
 

      By 14:30 Hrs at 1570 meters we had 8 cm of new, Base 200 cm.



FROM SEA TO SKY MIN REPORTS:

Duffey: March 12, 2021

Mount Fee Sz 3: March 12, 2021

Garibaldi: March 13, 2021

Wet Bulldozer: March 13, 2021

Storm Bordin: March 14, 2021

Approach to Armchair Glacier Avalanche: March 14, 2021


VIDEOS:

Snowmobile vs Avalanche: Older but impactful

Snowmobile vs Avalanche Volume 2: March 2021

Powder Picker March 14, 2021: David Jones


ARTICLES:

1 Dead in Mt Norikura avalanche: Japan

Hwy 742 closed after natural avalanche: Canmore

Four backcountry skiers rescued from an avalanche before sunset: Utah

Backcountry ski entry from resorts reconsidered after death: Utah

Hiker injured in avalanche on Mt Baldy: California



       Submit your best avalanche photo for a pair of Goggles March 1-31, 2021. Sea to Sky Area.

                                                    Thanks to Volkl Canada for sponsoring.


      Congratulations to Chuck Ratzlaff for his contribution in February.

No comments:

Post a comment