Bollettino valanghe

Jasper

Apr 26 – 27, 2023Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 3 years ago

Pericolo valanghe

Fri
Sat
Alta quota
2 · Moderato
Limite del bosco
3 · Marcato
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

We will get one more weak overnight freeze on Thursday night before the freezing levels skyrocket Friday afternoon. Watch out for pockets of wind slab as convective flurries can drop vastly different amounts of snow from valley to valley.

Problemi valanghivi

  • Wind Slabs

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

    Moderate to strong south west winds and new snow from convective activity will make new wind slabs.

  • Loose Wet

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

    Warming temperatures will continue to produce wet loose avalanches.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–4

    The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. The next few days could see this problem moving into the reactive category with dramatically rising freezing levels.

Weather Summary

Thursday

Sunny with cloudy periods

Alpine temperature: High 1 C

Ridge wind west: 10-25 km/h

Freezing level 2400m

Friday

Sunny with cloudy periods

Alpine temperature: Low -1 C

Ridge wind west: 10-20 km/h

Freezing level 3200 m

Saturday

Mix of sun and cloud

Alpine temperature: Low 4 C

Ridge wind southwest: 10 km/h

Freezing level 3500 m

Terrain and Travel Advice

  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported and no road patrol on the Icefields Parkway today.

Post avalanche observations to the MIN.

Snowpack Summary

Sun crusts on solar aspects into the alpine and a melt-freeze crust at tree line and below on all aspects. Small wind slabs in the alpine from moderate to strong SW winds with 2-5cm of recent snow available for transport. A layer of sun crust or facets lingers in the mid-pack. The main concern is the depth hoar and basal facets at the bottom causing our deep persistent slab problem.

Regioni coperte