Bollettino valanghe

Banff Yoho Kootenay

Apr 9 – 10, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

Start early to take advantage of good travel conditions and cool temperatures on Tuesday morning. We expect the hazard will rise later in the day as things warm up and the precipitation arrives.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Recent new snow and moderate West winds have created wind slabs in immediate lees areas of the alpine that can be triggered by skiers in some locations. This problem may increase later in the day on Tuesday as more snow arrives.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2.5
    Dig down to find and test the bond of the surface snow with the Mar 15 crust down 25-50 cm on steep solar aspects, bearing in mind that the bond can vary significantly with subtle changes in slope aspect, steepness or warming temperatures.

Weather Forecast

Tuesday will start out as a mix of sun and cloud with below freezing temperatures overnight helping with travel conditions. Some precipitation is expected to arrive Tuesday afternoon with up to 5-10 cm accompanied by strong West winds and freezing levels up to 2300m. Cooler temps and slightly drier conditions with some cloud is expected Wednesday.

Snowpack Summary

Moderate west winds over the past 24 hrs have created wind effect in open areas, and wind slabs in lee areas in the alpine, On solar aspects the March 15 sun crust is down 25-50 cm and has been sensitive to skier triggering over the last week. A temperature crust is present on all aspects below 2000m and higher on solar aspects.

Avalanche Summary

Some loose dry sluffing in the alpine due to strong wind gusts on Monday, as well as thin touchy wind slabs in immediate lee areas at local ski hills. Explosive control at Sunshine produced one size 2 wind slab. On Sunday a size 2 wind slab was observed on a NE aspect at 2600m near Lake Louise and some loose wet sluffing out of steep solar terrain.

Confidence

Timing of incoming weather systems is uncertain on Thursday

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