Bollettino valanghe

Glacier

Feb 21 – 22, 2023Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 4 years ago

Pericolo valanghe

Thu
Fri
Alta quota
4 · Forte
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato

In sintesi

EVERYONE!! STAY OUT OF WINTER PERMIT AREAS WHEN THEY ARE CLOSED!!!

People have entered closed areas (Griz Shoulder, Hourglass) 3 days in a row and the winter permit system is in danger of being shut down!

Speak up out there! Let violators know they are jeopardizing their lives from artillery, and everyone's access!

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–4

    Cornices are rapidly growing with snowfall and winds. A sharp drop in temps Tues AM can shock these big blobs, creating fragile conditions with sudden failures. These large natural triggers could reactivate our basal deep persistent weak layer.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Low density surface snow has created a dry loose avalanche problem in steep, sheltered terrain. Be cautious in steep gullies and on slopes with terrain traps at the bottom.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–3

    Continuing snowfall and strong winds will keep the storm slab problem active in the region. Watch for cracking in the snowpack and deeper slabs in wind loaded areas.

Confidence

Moderate

Avalanche Summary

Artillery control had good results Sunday night...notably Camp West, sz 4, had large timber knocked down across the highway.

On Sunday the field team remote triggered from ridge-top several storm slabs in steep gully features at Fidelity, sz 2-2.5, with crown depths of 30-40cm.

Touchy storm slabs were reported in the Asulkan near the hut, with unsupported rolls shedding sz 2-2.5 slabs.

Snowpack Summary

45cm of storm snow fell Sunday night, 65-80cm the last 2 days, along with mod-strong W'ly winds. Fresh storm slabs blanket the Alpine and exposed Treeline features. Low-density, deep snow is found in sheltered areas.

Several thin crusts are buried below the storm snow on steep solar aspects.

The deep persistent weakness at the base of the snowpack (rounding facets and a crust in some locations) has been showing signs of strengthening recently.

Weather Summary

Wild weather coming at us Monday night! An intense frontal passage will bring strong SW winds and high snowfall rates, then abruptly Tues AM, snowfall stops, winds flip to the E, and temps will drop 10 to 15 degrees.

Tonight: heavy snow, 25cm, strong gusty SW winds, Alp high -6*C

Tues: Isolated flurries, Alp high -16*C, light E winds

Terrain and Travel Advice

  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Loose avalanches may start small but they can grow and push you into dangerous terrain.
  • Avoid exposure to slopes that have cornices overhead.

Regioni coperte