Bollettino valanghe

Jasper

Apr 16 – 17, 2024Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 2 years ago

Pericolo valanghe

Thu
Fri
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

Watch for variable wind loading as the winds switched from SW to North and back.

Problemi valanghivi

  • Wind Slabs

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

    Moderate to strong winds have formed wind slabs on previous hard surfaces (sun crusts and old wind slabs).

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–3.5

    This problem seems to be most active where the March 19th crust is not supportive over the Feb 3rd weak layer (down 30-90cm) of facets over a crust. This problem remains a concern on shaded aspects above 2400m.

Confidence

High

Snowpack Summary

The last heat has formed a crust to 2600m on all aspects and up to mountain top on solar slopes. Solar slopes at treeline and below have a plethora of crusts in the upper snow pack.

On shaded slopes 10-20cm of recent snow has been redistributed by South to SW winds forming windslabs in the alpine. The Feb 3 PWL is down 40-100cm and remains a concern on shaded aspects and shallow areas, above 2400m.

The basal depth hoar/facets are gaining strength in deeper snowpack areas.

Weather Summary

Mountain Weather Forecast is available at Avalanche Canada

Tuesday Evening

Cloudy with clear periods and isolated flurries. Alpine low -13 °C. Ridge winds from NE 15 to 50km/h. Freezing level valley bottom.

Wednesday

A mix of sun & cloud. Alpine high -7 °C. North ridge winds 15-35 km/h

Thursday

Sunny with cloudy periods. Alp Low: -13 °C, High -9 °C. Ridge wind northeast: 15-35 km/h. Freezing level at valley bottom.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.

Regioni coperte