Bollettino valanghe

Northwest Inland

Mar 27 – 28, 2023Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 4 years ago

Pericolo valanghe

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

In sintesi

Tune in to the changing conditions of elevation, aspect, and time of day.

Be cautious in steep, rocky and wind-affected terrain where triggering a slab is most likely. Avoid steep sun-exposed slopes and overhead hazards during periods of strong sun.

Problemi valanghivi

  • Wind Slabs

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

    Easterly wind may have redistributed the surface snow into fresh pockets of wind slab in the alpine.

  • Loose Wet

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

    Warm temperatures and strong sun may create wet loose avalanche in steep south-facing terrain.

    Keep in mind, that wet loose avalanches may start small but they can grow and push you into dangerous terrain.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    2–3.5

    Weak, sugary faceted grains exist near the base of the snowpack. Riders are most likely to trigger this layer on steep, rocky slopes where the snowpack is thin and shallow. The likelihood of avalanche activity on this layer will increase during periods of rapid change to the snowpack, such as heavy snowfall, rain, or rapid warming. Cornices are also very large at this time of year and a cornice failure could trigger this layer.

Confidence

Moderate

Avalanche Summary

In the past few days avalanche activity has been limited to small (size 1) wet loose avalanches on steep solar aspects and a few natural cornice failures that did not pull slabs on the slopes below.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

Cool, clear weather has promoted surface faceting and surface hoar growth. A crust exist on the surface on all aspects below 1800 m and up to at least 2000 m on solar aspects.

The middle of the snowpack is strong and contains numerous hard crusts.

The lower snowpack is composed of weak basal facets. This layer has produced limited recent avalanche activity, however it can quickly become active again with any significant change to the snowpack, such as rapid loading (heavy snowfall or rain) or prolonged and extensive warming.

Weather Summary

Monday night

Clear. Alpine temperatures drop to a low of -5 °C. Ridge wind northeast 10-20 km/h. Freezing level at valley bottom.

Tuesday

Sunny with cloudy periods. Alpine temperatures reach a high of 0 °C. Ridge wind light from the northeast. Freezing level rises to 2000 metres.

Wednesday

Sunny with cloudy periods. Alpine temperatures reach a high of 1 °C. Ridge wind east 10-20 km/h. Freezing level rises to 1800 metres.

Thursday

A mix of sun and cloud. Alpine temperatures reach a high of -4 °C. Ridge wind light from the southeast. Freezing level rises to 900 metres.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Remember that in the spring strong solar radiation and warm temperatures can weaken the snow in a matter of minutes.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Regioni coperte