April 12, 2023

      AVALANCHE ACTIVITY:

       An avalanche has killed 3 Nepali Sherpa climbers on Everest. Article below.         Net Pic

      Five injured, rescued after being struck by an avalanche in Slovenia. Article below. MRAS Pic

   No new avalanche control on Whistler Tuesday am, ski cutting produced Sz 1 soft storm slabs in pm.

      No new avalanches observed on Blackcomb Tuesday am, Sc Sz 1's soft storm slabs in the pm.

      WEATHER YESTERDAY:

      Sunrise Tuesday was at 06:27 Hrs. -7 Deg C with a 5-15 KPH South wind at 1860 m. S-1.

      08:00 Hrs. -6 Deg C with a 10-20 KPH ESE wind at 1835 m. S-1

     10:00 Hrs. -5 Deg C with a 10-30 KPH ESE wind at 1835 m. S-1

      Tuesday April 11, 2023. 12:00 Hrs. -6 Deg C with a 15-45 PKH South wind at 1835 m. S-1.

     14:00 Hrs. -7 Deg C with a 40-65 KPH South wind at 2280 m. S-1

      16:00 Hrs. -3 Deg C with a 10-30 KPH SW wind at 1860 m.

     

Weather Observations for April 12, 2023 taken at 06:00 Hours.

2280 meters    -12, Winds were 35-45 KPH NE--Horstman Hut

2180 meters    -10, Winds were 25-45 KPH NNE--Whistler Peak

1860 meters     -9, Winds were 25-35 KPH NE--Rendezvous  

1835 meters     -7, Winds were 25-40 KPH SW--Round House

1650 meters     -8, 8 cm in 12 Hrs, 13 cm in 24 Hrs. Base 280 cm--Pig Alley

1570 meters     -8, 5 cm in 12 Hrs,   8 cm in 24 Hrs. Base 186 cm--Catskinner

  660 meters     -2, Valley Temp, Max temp Yesterday was +4.5, 4.3 mm of precip yesterday.

     As of 06:00 Hrs, 11.7 mm in precip gauge, 8 cm of new snow. Base 280 cm.

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

FORECAST:

A ridge of high pressure will bring sunny skies for today in an Easterly transitioning to a Northeasterly flow aloft. The FL is below surface this am and may go higher than 1500 m today with daytime heating. FL should drop back down below surface tonight. A weak frontal band arrives for Thursday with an impulse of moisture in the am. Unsettled later in the pm with a mix of sun and cloud. Dirty ridging brings a mix of sun and cloud for Friday. Weak frontal band arrives Saturday with light precipitation, the front becomes more vigorous Sunday with wet, warm, windy weather. Slowly dries out Monday with periods of light precipitation. Dirty ridging for  Tuesday. Guesstimates: 0 cm by Thursday am, 1-4 cm by Friday am, trace -2 cm by Saturday am, 8-12 cm by Sunday am, 25-40 cm by Monday am.

      GOES IR IMAGE from this am.

      WINDY IMAGE 2023/04/12. 05:00 Hrs.

          High pressure for Wednesday with sunny skies.

      Dry day Wednesday, sunny skies.

     Easterly-Northerly flow aloft.

    Weak front on Thursday, mixed bag with mostly overcast skies, some sunny breaks and flurries.

       Some very light precipitation for Thursday.

           Dirty ridging for Friday with a mix of sun and cloud.

      Dries out Friday with a dirty ridge.

                 Low will send an upper trough with precipitation on Saturday into Sunday.

      Light precipitation on Saturday.

      Light/moderate precipitation on Sunday.

      INFORMATION AND OBSERVATIONS:

      08:15 Upload Tuesday am.

      Snowing in the valley in the am.

      Periods of moderate snowfall Tuesday am.

      Breaks in the valley at 12:30 Hrs.

      Snow line was down to 750 m.

     Cornices become troublesome in April.

      Challenging visibility in the alpine, there were a few nice mid day breaks.

     Xe Cornice control from Monday.

      You can always find nice tracks somewhere!

      Blown in on Fallers Pillow.

       Convective cloud development brought some graupel for the pm.

      Snowing 5 cm per hour for an hour. 

      Unsettled 15 minutes later.

FROM AVALANCHE CANADA:

Travel and Terrain Advice

Be alert to conditions that change with elevation and sun exposure.

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

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

Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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

LOCAL MIN REPORTS:

Avalanche: April 10, 2023

Lazy Boy Avalanche: April 10, 2023

SHORT CLIPS:

Snow Sup Surfing: Looks Cool

Bucked Off: Sledding

Full Throttle: Wheelie

Synchronized Turns: Interski 2023

ARTICLES:

An avalanche has killed three Nepali Sherpa Climbers: Everest

Video of seven people rescued after being swept away by an avalanche: Slovenia (google translate)

Five injured in an avalanche on Mt Mala Mojstravka: Slovenia

More information on the deadly avalanche that killed 6 ski tourers: France

Avalanche on the Armancette Glacier--Questioning of forecasting models: France

Avalanche closes Berthoud Pass: Colorado

Inbounds avalanche at Snowmass Ski Area 'appears' naturally triggered official says: Colorado

Snowboarder goes for a ride: Utah

Look Up--Avalanches don't care if you're hiking on a trail with no snow!:Utah

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