Bollettino valanghe

Kootenay Boundary

Mar 6 – 7, 2019Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

Fri
Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Variable snowfall amounts are expected across the region by Thursday, from 10 to 20 cm. The persistent slab problem still exists and is best controlled by diligent group management.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2.5
    Two layers of weak surface hoar and/or a crust are buried 40 to 80 cm. These layers have recently been the most active between 1700 m and 2200 m and on southwest to southeast aspects. The problem is best controlled with appropriate group management.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    New snow Wednesday night into Thursday may not bond well to the previous surfaces. The snow may be reactive to human traffic in areas where enough snow accumulates.

Confidence

Moderate - Intensity of incoming weather systems is uncertain

Weather Forecast

WEDNESDAY NIGHT: Cloudy with snowfall, accumulation 5 to 15 cm, light to moderate southwest wind, alpine temperature -6 C.THURSDAY: Cloudy with light snowfall, accumulation 2 to 5 cm, moderate southwest wind, alpine temperature -11 C.FRIDAY: Cloudy with light snowfall, accumulation 1 to 3 cm, light to moderate west wind, alpine temperature -11 C.SATURDAY: Cloudy with isolated snowfall, trace accumulation, light northwest wind, alpine temperature -10 C.

Avalanche Summary

Small sluffing was observed in steep terrain on Tuesday. Otherwise, no new avalanches were observed.

Snowpack Summary

Around 10 to 20 cm of new snow is expected to fall Wednesday night into Thursday. This snow will fall on a wind-affected snow surface in exposed terrain, soft and faceted snow in sheltered areas, and a melt-freeze crust on southerly aspects.Two layers of weak and feathery surface hoar crystals are buried in the snowpack between 40 and 80 cm deep, which were buried mid-February and early-February. The layers may be associated with a melt-freeze crust on southerly aspects. These layers remain reactive in snowpack tests and have produced sporadic avalanches in the region over the past week.

Regioni coperte