Bollettino valanghe

Kootenay Boundary

Mar 3 – 4, 2015Avalanche Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Thu
Fri
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole

In sintesi

Snow quality should be slightly improved, but be wary of touchy thin wind slabs and loose snow sluffing in steep exposed terrain.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Light new snow combined with moderate (variable) winds have created pockets of thin wind slab in the immediate lee of ridge crests and terrain features.

Confidence

Good - The weather pattern is stable

Weather Forecast

A very persistent ridge of high pressure will maintain dry and mainly sunny conditions for… a long time (at least a week, but probably longer). Temperatures should slowly rise with a freezing level near 1200-1400 m on Wednesday, 1500-1600 m on Thursday, and around 2000 m heading into the weekend. Ridge winds should be generally light but gusting to moderate from the NW-SW.

Avalanche Summary

On Monday there were reports of small rider-triggered loose snow avalanches in steep terrain. It might also be possible to trigger thin pockets of wind slabs in exposed lee terrain.

Snowpack Summary

Shady and sheltered slopes have around 5-10 cm of fresh low-density snow, with thin wind slabs forming in exposed lee terrain. Sun-exposed slopes likely have a thin sun crust on the surface. The most prominent feature in the snowpack is a thick crust, down 5-30 cm. This crust is supportive all the way to ridge crest and is effectively "capping" the snowpack, keeping riders from tickling any deeper weak layers. There are still weak layers below this crust that we'll continue to monitor, but for now these layers are dormant. We would likely need significant warming and/or heavy loading to re-activate them.

Regioni coperte