Bollettino valanghe

Banff Yoho Kootenay

Mar 28 – 29, 2014Parks Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

Sun
Mon
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Light wind with strong gusts are forecast and this may create a more widespread wind slab issue. This combined with the other field results today led us to bump up the hazard. Pick your lines carefully and some incredible skiing/boarding can be had!

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    This is not yet a wide spread issue and only a few soft wind slabs to size 2 were observed today in the immediate lees of terrain. Monitor slab development with wind gusts tomorrow as this may develop into more of a problem.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3
    In areas with uneven, shallower or weaker snowpacks, we remain concerned with the Feb 10th midpack layer of crust/facets/surface hoar (Kootenay burns) and the basal facet layer. Stick to lower angled well supported terrain in these areas.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    More sluffs observed today on South and North aspects, up to size 2. Watch your exposure to steep terrain overhead, especially if the wind gusts pick up.

Weather Forecast

Cloudy skies, light winds and moderate to strong gusts forecasted for tonight and tomorrow. Flurries for Sunday, 5-10 cm expected, greater amounts in the Bow Summit area.

Snowpack Summary

Up to 47 cm (sunshine & yoho) over past 3 days, generally bonding well and has had little wind effect so far. In shallow or weaker snowpack areas, the basal facets and Feb 10 layers are still reactive. In deeper uniform North aspects, these problems are less of a concern. South aspects, there are a few buried suncrusts that may pose a problem.

Avalanche Summary

A few soft storm slab naturals to size 2 in immediate lees in the alpine, sluffs up to size 2, and 2 days ago - a size 2.5 to ground in a shallow snowpack area in Little Yoho, East facing alpine slope. A couple of whumphs today in Purple Bowl and above Elevator shaft (Louise region) on the basal facets that propagated 50-300 m.

Confidence

Regioni coperte