Bollettino valanghe

Jasper

Feb 26 – 27, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

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

In sintesi

A firm slab, sitting over several persistent weak layers, can be found in isolated areas in the forecast region. Triggering it remains possible and would be a high consequence event. 

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Expect hardslabs in the alpine and a few softer slabs at treeline. The cold has kept these in check and helped them settle over the last few days but some caution is still warranted.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–3.5
    A stiff slab 50 to 80cm thick, sits over sun Crusts (south and west aspects), Surface Hoar (at, and just above treeline) and weak Faceted Crystals (very developed in shallow snowpack features).

Weather Forecast

Monday will be cloudy with sun and flurries, trace amounts of snow, and -14 with light gusting moderate West winds. Tuesday will be sunny periods and flurries, trace snow, -17 to -12 and light gusting strong West winds. Wednesday will be similar to Tuesday with lighter winds. 

Snowpack Summary

Strong W and N winds have left wind slabs and wind effect in open areas. The upper snowpack has settled to form a cohesive stiff slab that is sitting on three persistent weak layers mid-pack (down 50 to 80cm) which can be found throughout the forecast region, and did produce many large avalanches during the Feb 8th cycle.

Avalanche Summary

Helicopter patrol down highway 93 noted no new avalanches and visibility was good. This past week there was minimal natural activity yet it is still prudent to treat slopes that did not avalanche in the Feb 8 cycle as being suspect.

Confidence

The weather pattern is stable

Regioni coperte