Bollettino valanghe

Banff Yoho Kootenay

Jan 22 – 23, 2015Parks Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Thu
Fri
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

The snowpack is slowly strengthening; however, conservative decision making in bigger alpine terrain is still essential! We may see some snow late friday PM which would cause the danger to rise again.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Surface windslabs formed on Jan 18/19 can be triggered by skiers and climbers. Feel for tension in the surface snow and avoid freshly windloaded terrain.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    In shallower snowpack areas (most of the region) the weak base of the snowpack persists and could be triggered in steep, rocky terrain features. Although in some areas, the Dec. 18th layer persists, management of both layers should be the same.

Weather Forecast

Thursday and Friday look to be similar to the last few days - mild temperatures, light winds and scattered clouds. Friday afternoon, we should see increased winds from the West and 10-15 cm's overnight with freezing levels rising to ~1500m.

Snowpack Summary

The snowpack remains fundamentally weak, with a combination of windslab, surface hoar and basal facets all causing concern in different types of terrain. Snowpack tests continue to produce moderate to hard sudden results on the basal weakness/ Dec. 18th interface which has become one and the same in many areas.

Avalanche Summary

No natural avalanches observed, but forecasters on Mt. Field reported a couple large whumphs in an open area below treeline, indicating human triggering of deeper weak layers is still possible in the right terrain.

Confidence

Forecast snowfall amounts are uncertain on Saturday

Regioni coperte