17 Mar 2023

March 17, 2023


       Another fatal avalanche in Verbier Ski Area, Switzerland. Article below.                    Valais Police Pic

          Sz 1.5 Sa 2023/03/16 Poop Chutes                                                                                   NK Image

      A bit closer.                                                                                                                     AC Pic

      Sz 1.5 Sa in S Turn.                                                                                                                  NK Pic

       Looking down the slide path.                                                                                                NK Image

      Those trees have been hit before!!                                                                                      NK Image

      Some cornice control performed Thursday on Whisler.

      Cornice control with explosives Xc in Flute Thursday am. Sz 2 cornice debris.

      Older cornice debris in Glacier Bowl.

      Some cornice control on Blackcomb Thursday. Sz 1.5 X 2 in Blackcomb Provincial Park.

      Sz 1 Xc Fallers East Thursday am.

       Snow balling and pinwheeling Thursday afternoon.

      Small Pinwheel.


      Sunrise on Thursday was at 07:24 Hrs. -7 Deg C with a 5-10 KPH ESE wind at 1835 m.

      08:00 Hrs. -7 Deg C with a 0-5 KPH Variable breeze at 1860 m.

      10:00Hrs. -6 Deg C with a 5-10 KPH ENE wind at 1835 m.

     Thursday March 16, 2023. 12:00 hrs. -5 Deg C with a 5-10 KPH NE breeze at 1835 m. 

      14:00 Hrs. 0 Deg C with a 5-10 KPH SW wind at 1860 m.

      16:00 Hrs. -5 Deg C with a 15-20 KPH South wind at 2280 m.


Weather Observations for March 17, 2023 taken at 06:00 Hours.

2280 meters     -9, Winds were 20-25 KPH S--Horstman Hut
2180 meters     -8, Winds were 25-30 KPH SE--Whistler Peak
1860 meters     -7, Winds were   5-10 KPH SE --Rendezvous  
1835 meters     -6, Winds were 10-15 KPH SE--Round House
1650 meters     -7, 0 cm in 12 Hrs, 0 cm in 24 Hrs. Base 240 cm--Pig Alley
1570 meters     -6, 0 cm in 12 Hrs, 0 cm in 24 Hrs. Base 162 cm--Catskinner
  660 meters     -5, Valley Temp, Max temp Yesterday was +7.6, 0.0 mm of precip yesterday.

      No new snow on the board. Base ? 240 cm.

      As of 07:00 Hrs this am we have clear skies and unlimited visibility.


Ridge in place this am with sunny skies, should see some high cloud development as the day progresses in a Southerly flow aloft. The FL is presently below surface with daytime heating bringing the FL to around 1800 m this pm dropping back to around surface tonight. Dirty ridging for Saturday with a mix of sun and cloud. Very weak shortwave trough in the mix. Weather from the North will send cloud our way on Sunday with mostly overcast skies. Some flurries Sunday night as the frontal band moves into the area for Monday with light/moderate precipitation. Front dissipates early Tuesday am with mostly overcast skies for the remainder of the day. Weak ridging for Wednesday am with a mix of sun and cloud, some flurries possible. A frontal band is forecasted for Thursday. Time will tell. Guesstimates: 0 cm by Saturday am, 0 cm by Sunday am, 1-3 cm by Monday am, 8-12 cm by Tuesday am, 0-trace by Wednesday am, 0-trace by Thursday am, 5-10 cm by Friday am. 

      GOES IR image from this am.

       WINDY IMAGE 2023/03/17. 05:00 Hrs.

       High strengthens this am with warm temperatures for St Paddy's Day. Overcast in the pm.

      Dry for Friday with warm daytime highs.

      Southerly flow aloft.

                Dirty ridging for Saturday with a mix of sun and cloud. Warm pm temps.

      Low moves down the coast, dry day with no precipitation Saturday.

        Low to the North will send a frontal band down the coast Sunday night. Warm.

      Dry Sunday am/pm with frontal band arriving Sunday night. 

        Low off the coast, frontal band for Monday with precipitation. Cooler temps.

      Light/moderate precipitation on Monday. 

      Frontal band dissipates early Tuesday am, lingering cloud with dry weather.

      Dirty ridging on Wednesday, dry with a mix of sun and cloud.


     09:13 Hrs.

      Great looking snow in the alpine.

      Surface Hoar had a good night.

      Sweet looking turns.

      Cowboy Ridge.

      Not the same as being on Cowboy Ridge.

      Just a bit of exposure!

      Moist snow in the valley Thursday pm. High in the valley of +7.6 deg C.

      Awesome early morning Friday. 04:00 Hrs. -9 Deg C with a 20-25 KPH South wind at 2280 m.


Travel and Terrain Advice

Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

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.

CONSIDERABLE!!--SEA TO SKY ADVISORY available top right sidebar!


Foon Alley & Poop Chutes: March 16, 2023


Bucked Off: Bronco Sled

Avalanche started from cornice chunk: Colorado

Sz 1 Sa Soft Slab: Avalanche

High marking: Alaska


Another fatal avalanche in Verbier: Switzerland

9-year-old boy found in 'semi-conscious' condition after being buried in roof avalanche: Utah

Near miss as Massive avalanche sweeps through French Ski Resort: Tignes

Skiers race to escape avalanche at Tignes in harrowing video: France

Massive avalanche hits ski resort in Sochi: Russia

Snowboarder killed in Pauline Peak Avalanche identified: Oregon

On the mountain, risk can be mitigated, never eliminated: Globe & Mail

Berthoud Pass back open after avalanche closure: Colorado

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