Bollettino valanghe

Jasper

Apr 4 – 5, 2021
Vedi sulla mappa
Archiviato · scaduto 5 years ago

Pericolo valanghe

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

In sintesi

!Solar aspects are of most concern!Loose wet should be on your mind at tree line and below. While committing to tree line and steep alpine, carefully assess for sun crust below.Polar aspects have a lot of fun turns to offer.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2.5

    New and building wind slabs can be found in lee features near ridge crests, and cross-loaded gullies.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3

    When in the Whistlers/Portal and Maligne Regions identify and assess the bond at this mid-pack layer. This interface shows strength in field tests, but there is concern for wide, spatial variability over large and/or connected features.

  • Loose Wet

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

    Expect loose wet avalanches, especially in the heat of the day. Solar aspects TL and below are suspect.

Weather Forecast

Monday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: High -4 °C. Ridge wind west: 15 km/h. Freezing level: 1800 metres.

Tuesday: Cloudy with sunny periods and isolated flurries. Precipitation: Trace. Alpine temperature: Low -7 °C, High -3 °C. Ridge wind southwest: 15 km/h gusting to 45 km/h. Freezing level: 1900 metres.

Snowpack Summary

HST of 10-30cm of new snow becoming moist TL and below on solar aspects. Shifting winds forming isolated wind slabs at TL and ALP. The snowpack shows good bonding in field tests in deeper snowpack areas, shallow snowpack regions such as Whistler/Portal and Bald Hills have bigger a potential for weak layers to wake up and are more complex to assess.

Avalanche Summary

Sunday patrol in the Icefields region observed several small loose wet at TL and below on steep solar aspects. Few storm slabs observed up to size 2 on solar aspects at TL where suspected sun crust from March 19th is more developed. 1 large size 3 cornice triggered slab avalanche seen on Churchil Range, this avalanche ran on deeper instabilities.

Confidence

Freezing levels are uncertain

Regioni coperte