Bollettino valanghe

Northwest Coastal

Mar 7 – 8, 2023Avalanche Canada
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Archiviato · scaduto 4 years ago

Pericolo valanghe

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

In sintesi

Windslabs may be found on a variety of aspects due to recently shifting wind direction. The air is cold but the March sun can be strong so avoid exposure to cornices and watch for signs of warming on steep south aspects.

Problemi valanghivi

  • Wind Slabs

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

    Many terrain features have been reverse-loaded by winds over the weekend. Older wind slabs are harder to triggered but can still deliver surprises. Variability in direction of recent winds means wind slabs might be found on a variety of aspects.

Avalanche Summary

No new avalanches were reported on Sunday or Monday.

On Saturday, there were a few reports of storm slab avalanches, a size 2.5 triggered by a cornice fall north of Stewart and a size 1.5 accidentally triggered by a skier north of Terrace.

Confidence

High

Snowpack Summary

Surface conditions are a mix of very wind affected snow in exposed terrain features, old wind slabs on lee aspects, sun crusts on steep solar aspects, and preserved softer snow in sheltered areas making for nice riding.

A layer of small surface hoar or facets is now buried over 80 cm deep. A facet/crust layer formed in late January exists around 150 cm deep. Large avalanches were suspected to have run on this layer in mid February. Triggering these deeper layers may still be possible in places where the snowpack is shallow.

The lower snowpack is generally well consolidated but as you move further inland where the snowpack is thinner, basal instabilities linger.

Weather Summary

Monday night

Some thin cloud. Wind from the north at 10 km/h. Temperature -18˚C.

Tuesday

Mostly clear and cold. Wind from the north at 10 km/h. Temperature -15˚C

Wednesday

A mix of sun and cloud. Up to 4 cm of new snow. Wind from the northeast at 10 km/h. Warming to -5˚C in the afternoon.

Thursday

Clear and cold overnight with temperatures dropping to -15˚C and rising to -5˚C in the afternoon. Wind from the north at 10 km/h.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Keep in mind that human triggering potential persists as natural avalanching tapers off.
  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Regioni coperte