Boletín de aludes

Jasper

Dec 25 – 26, 2014Parks Canada

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Archivado · caducó 12 years ago

Peligro de aludes

Thu

Fri

Alta montaña

2 · Moderado

Límite del bosque

2 · Moderado

Bajo el límite

1 · Débil

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Lo esencial

Tiny Tim and the Ghost of Christmas Past found good turns on Hilda Ridge, Merry Christmas one and all.

Problemas de aludes

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alta montaña
Límite del bosque
Bajo el límite del bosque
Probabilidad
Possible
Tamaño
1–2
Wind loading producing soft slabs on lee features at and above treeline. A field team on the 24th found a generally stable snowpack with hard and moderate shears in the upper snowpack at alpine elevations. Good skiing in sheltered spots.
Deep Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta montaña
Límite del bosque
Bajo el límite del bosque
Probabilidad
Possible
Tamaño
1–3
This weak layer exists below a strong mid-pack at treeline and sub-alpine elevations. Surface slides or cornice collapse could trigger this deep persistent weakness.

Weather Forecast

No significant snowfall is forecast until the weekend when up to 10cm may arrive in the Icefields area. Temperatures will drop over Christmas with overnight lows in the low teens but warming during the day. Over the next 24 hours winds will remain light from the West and at upper elevations NW. Over the weekend these are forecast to increase.

Snowpack Summary

Wind slab forming on lee alpine ridge lines. Large surface hoar crystals formed last week are being buried by new snow. This layer is more likely to be found on sheltered slopes at tree line and below. The interface between the strong mid-pack and weaker basal facets is most susceptible to human triggering from shallow rocky areas.

Avalanche Summary

Three new avalanches were recorded in the Columbia Icefields area. The events were size 2 thin storm slabs and class 1.5 point releases from steep slab alpine terrain.

Confidence

The weather pattern is stable

Regiones cubiertas

Jasper