Boletín de aludes

Jasper

Dec 29 – 30, 2012Parks Canada

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Archivado · caducó 14 years ago

Peligro de aludes

Sat

Sun

Alta montaña

2 · Moderado

Límite del bosque

2 · Moderado

Bajo el límite

1 · Débil

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Lo esencial

Continued loose snow avalanches on steep alpine and tree line slopes. Be prepared for these sloughing on or under slopes and ice climbs .

Problemas de aludes

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alta montaña
Límite del bosque
Bajo el límite del bosque
Probabilidad
Unlikely - Possible
Tamaño
1–3
Moderate to strong westerly winds have created wind slab conditions on slopes and along ridge lines especially in the Icefields area. No avalanche activity has been observed on this condition, however, we have not tested the bonding strength.
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
On Wednesday, small natural slab avalanches to size 1.5 were observed on the basal facets in thin snowpack areas. Triggering is most likely to happen along edges of shallow pockets and from thin spots like rocks or trees.

Weather Forecast

Light NW winds with the possibility of some light snow flurries can be expected on Saturday. Cool overnight temperatures will warm to above seasonal values by the afternoon with sunny breaks.

Snowpack Summary

Moderate to strong SW winds have created slab conditions on open tree line slopes and along ridge lines in the alpine. The mid-pack is facetting but remains strong where it is deeper than a meter. In shallow areas, facetting has weakened it significantly.

Avalanche Summary

In the past 2 days, surface facets have created numerous small loose avalanches at tree line and above in the Icefields area. These slides have little mass and have not as yet triggered the wind slabs beneath them. No natural slab avalanches were observed today.

Confidence

Due to the number and quality of field observations on Saturday

Regiones cubiertas

Jasper