19 Mar 2023

March 19, 2023

      AVALANCHE ACTIVITY:

      An avalanche has killed a ski tourer, injured 2 near Marble, CO. Articles below.                  CAIC Pic


      Sa on Rainbow 2023/03/16.                                                                                    Alexis Miquelon Pic


     Snowballing on Rainbow Mountain 2023/03/17.                                             Alexis Miquelon Pic

      Pinwheeling, Pemberton Icefield. 2023/03/17.                                                        Al Collis Pic



      No new avalanches observed on Whistler. Sz 1-1.5 wet loose on steep solar aspects.


       No new avalanches observed on Blackcomb, some wet loose on steep solar aspects.


      Reports of natural cornice releases with up to Sz 2.5 slab results. It is warm!!!





      WEATHER YESTERDAY:

     Sunrise Saturday was at 07:20 Hrs. Sunset will be at 19:20 Hrs. 12 Hrs of Daylight. -4 Deg C.

      08:00 Hrs. -6 Deg C with a 20-25 KPH SE wind at 2280 m.


      Saturday March 18, 2023. 12:00 Hrs. 0 Deg C with a 5-10 KPH SE Breeze at 1835 m.


     14:00 Hrs. -3 Deg C with a 25-40 KPH South wind at 2280 m.


     16:00 Hrs. -1 Deg c with a 20-35 KPH SSW wind at 2280 m.



Weather Observations for March 19, 2023 taken at 06:00 Hours.

2280 meters     -4, Winds were 25-30 KPH S--Horstman Hut
2180 meters     -4, Winds were 25-30 KPH SE--Whistler Peak
1860 meters     -2, Winds were   5-15 KPH ESE --Rendezvous  
1835 meters     -1, Winds were   5-15 KPH ESE--Round House
1650 meters     -3, 0 cm in 12 Hrs, 0 cm in 24 Hrs. Base 231 cm--Pig Alley
1570 meters     -1, 0 cm in 12 Hrs, 0 cm in 24 Hrs. Base 156 cm--Catskinner
  660 meters     -3, Valley Temp, Max temp Yesterday was +12.2, 0.0 mm of precip yesterday.

High in Squamish yesterday was +19 Deg C.


      As of 06:00 Hrs we have no new snow. Base 231 cm.


        As of 07:00 Hrs this am we have high broken cloud and unlimited visibility.





FORECAST:

Weak frontal band along the coast will spill cloud into the area with mostly overcast skies but dry conditions in a warm Southerly flow aloft. The FL is below surface and could spike to 2000 m again today, dropping to 1000 m by tomorrow am. A weak front is arriving Monday afternoon with light precipitation into early Tuesday am. Weak ridging will bring a mix of sun and cloud Tuesday am. The dirty ridge becomes stronger on Wednesday with sunny skies in the forecast. Another frontal band arrives Thursday with light/moderate precipitation, and slightly lower than average temperatures. Front weakens on Friday with some light precipitation and overcast skies. Guesstimates: 0 cm by Monday am, 4-8 cm by Tuesday am, 0 cm by Wednesday am, trace-1 cm by Thursday am, 10-15 cm by Friday am, 1-3 cm by Saturday am, trace-2 cm by Sunday am.



      GOES IR IMAGE from this am.


      WINDY IMAGE 2023/03/19. 05:00 Hrs.


        Low pushing cloud into the area Sunday. Above seasonable temperatures.


      Overcast but dry for Sunday.


      Southerly flow aloft.


       Low eventually send frontal band into the area Monday pm. Above average temperatures.

      Light precipitation Monday afternoon.


        Low moves South on Tuesday, unsettled weather in its wake. Above average temps.


      Early am precipitation, dries out with dirty ridging Tuesday.


        Low, well to the North with high strengthening,  sunny skies for Wednesday. Warm.


      High strengthens for Wednesday with a dry sunny day.


      Weak frontal band arrives Thursday with light precipitation.


      Weakening low as it shifts West with mostly overcast skies and flurries for Friday.



      INFORMATION & OBSERVATIONS:

      09:00 Hrs, looking like an awesome morning.


      Windy image from the same time frame as above.


      Early morning cloud on Wedge.


       The clinic heli-pad has been busy in the past few days.

      Whistler SAR performed a CDFL Mission Friday for injured ski tourer. Lucky! Bryce Anderson Pic


      Spectacular Cord.


       Increase in cloud development as the day progressed.

      Felt like spring in the valley. High of +12.2 Deg C. FL went to 2000 m. High of +3.5 at 1860 m .


      Weekend Chutes. You can lose your pass for one year skiing permanently closed areas.

      Nice light with some high cloud later in the pm.




FROM AVALANCHE CANADA:

Travel and Terrain Advice

Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

Closely monitor how the new snow is bonding to the crust.

Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet

Pay attention to cornices and give them a wide berth when traveling on or below ridges.


MODERATE--SEA TO SKY ADVISORY top right sidebar.




LOCAL MIN REPORTS:


Red Heather Meadows: March 18, 2023

St Patrick's Cowboy: March 17, 2023



SHORT CLIPS:

Runaway: Nice Save


Big tree: Ejected

Big Air: Big Avalanche

Avalanche Conditions: Utah





ARTICLES:

Man killed, two others injured near Marble: Colorado

Preliminary report on ski tourer killed in an avalanche near Marble, CO: CAIC

Deadly week of avalanches: Switzerland

Route 395 remains closed after being buried by avalanches: California

How the Colorado Information Centre investigates fatal slides: CAIC




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