Bollettino valanghe

North Columbia

Jan 21 – 22, 2020Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 7 years ago

Pericolo valanghe

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

In sintesi

Storm slabs may be reactive to human triggering, especially in wind loaded areas, and at upper elevations. Watch for signs of instability such as whumphing, cracking and recent avalanches.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3

    A layer of surface hoar is buried 80 to 150 cm deep in the Selkirks and northern tip of the Monashees.

  • Storm Slabs

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

    Around 10 to 30 cm of snowfall accumulated over the weekend and has been accompanied by strong southwest wind. The deepest and touchiest slabs will likely be in lee terrain features near ridges.

Confidence

Moderate -

Weather Forecast

MONDAY NIGHT - Cloudy with clear periods / southeast wind, 10-30 km/h / alpine low temperature near -4

TUESDAY - Mainly cloudy with isolated flurries, up to 5 cm / southeast wind, 10-30 km/h / alpine high temperature near -4

WEDNESDAY - Cloudy with sunny periods and isolated flurries / southwest wind, 15-25 km/h / alpine high temperature near -7

THURSDAY - Flurries,10 cm / southeast wind, 30-50 km/h / alpine high temperature near -3 / freezing level 1400 m

Avalanche Summary

There have been reports of a few natural and explosives triggered storm and wind slab avalanches, mostly size 1.5-2 on Sunday and Monday 

A few small (size 1) storm slab avalanches were triggered naturally and by humans on Saturday. They were generally 10 to 20 cm thick and on all aspects.

Snowpack Summary

Around 10 to 30 cm of snow has fallen in the past couple of days. Fresh snow combined with recent moderate winds and relatively warm temperatures will mean that storm slabs have likely formed in many areas. 

A layer of surface hoar buried 80 to 150 cm deep could still be a concern in certain parts of the Selkriks and the northern end of the Monashees. 

Terrain and Travel

  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Approach steep open slopes at and below treeline cautiously, buried surface hoar may exist.

Regioni coperte