Bulletin d’avalanche

Jasper

Jan 23 – 24, 2018Parks Canada

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Archivé · expiré 9 years ago

Danger d’avalanche

Wed

Thu

Alpin

2 · Modéré

Limite forestière

2 · Modéré

Sous la limite

1 · Faible

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Points saillants

Recent storm snow has made for good skiing at and above treeline in sheltered locations.

Problèmes avalancheux

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Unlikely - Possible
Taille
1–2
Small inputs of fresh storm snow with southwesterly winds continue to build small lenses of windslab in sheltered lee features.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Possible
Taille
1–2.5
Well preserved surface hoar has been found in several treeline locations in the Icefields area. Shear tests were easy failures 35cm deep on this layer.
Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Unlikely - Possible
Taille
1–2.5
This layer is primarily weak facets and had easy failures at treeline in test profiles today down 40 to 50cm.

Confidence

Due to the number of field observations on Monday

Weather Forecast

A strong SW flow with a series of low pressure storm cells tracking west from BC will give unsettled weather with light snow until later in the week. Tuesday: Cloudy with sunny periods/isolated flurries. Precip: 4cm. Alpine Low -13°C, High -8°C. Ridge wind moderate SW. Wednesday: Snow flurries, 9cm. Alpine temp: Low -8°C, High -4°C.

Snowpack Summary

Small amounts of new snow this week continue to add windslab above treeline. Early January surface hoar down 35cm, mid December facets down 50cm, and basal facets 20cm above ground are the main weak layers in the snowpack. Field teams had easy shear failures today on a SE open slope at treeline in the Icefields area down both 35cm and 50cm.

Avalanche Summary

Limited visibility with no new notable avalanche observations.

Régions couvertes

Jasper