Bollettino valanghe

Banff Yoho Kootenay

Mar 12 – 13, 2015Parks Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

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

In sintesi

In eastern areas of the forecast region (Banff area), the danger rating will be higher as repeated days of warm weather with little overnight recovery is taking its toll on the snowpack. Temperatures have been cooler along the continental divide.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    5 - 10 cm's of new snow has been blown by strong west winds into small windslabs in the alpine. In some areas this covers isolated areas of older windslab that has been reactive to human triggering over the past week.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    The warm temperatures will create wet sluffs and rockfall on south facing slopes and gullies at and below treeline. Ice climbers should avoid this terrain, and instead search for north facing climbs where the cold temperatures will keep things solid.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    The lower half of the snowpack is weak due to the presence of basal facets and depth hoar. This layer has been dormant lately but may waken up with the warm temperatures (especially east of the divide where temperatures have been warmer)

Weather Forecast

Friday should be partly cloudy with a weak freeze in the AM but some clouds to keep the solar radiation at bay. Forecasts are calling for a short but intense storm starting Saturday around noon which should deposit 20 - 30 cm's of new snow above 2000m with rain below. Alpine winds will be moderate to strong from the W/ SW throughout the period.

Snowpack Summary

There is a wide range of conditions from east to west at this time. Eastern areas (Banff) are subject to the warm temperatures which are effecting the snowpack on S and W aspects. Further west the temperatures have remained cool enough that treeline and alpine snowpacks have remained solid and new snow has made fresh windslabs in the alpine.

Avalanche Summary

No new avalanches observed or reported today.

Confidence

Timing of incoming weather systems is uncertain on Saturday

Regioni coperte