Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 1–4
Recent winds have created new wind slabs behind ridges and terrain breaks.
Bulletin d’avalanche
Voir sur la carteNorthwest Coastal
Feb 6 – 7, 2012Avalanche Canada
Archivé · expiré 15 years ago
Danger d’avalanche
Wed
Thu
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
Problèmes avalancheux
Cornices
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible - Likely
- Taille
- 3–7
Large cornices are looming over some slopes and could act as a trigger for avalanches if they collapse.
Loose Wet
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Likely
- Taille
- 3–7
Direct sun and warming can trigger loose avalanches, especially in steep south-facing terrain. It might be hotter at alpine elevations than in the valley, so be aware of what's cooking above you.
Avalanche Summary
A few cornice falls have been observed over the past couple of days. Wind loading led to a localized avalanche cycle near Stewart on Sunday. Several solar-triggered avalanches have been observed on sunny slopes during the heat of the day.
Confidence
Fair - Timing, track, or intensity of incoming weather is uncertain on Thursday
Weather Forecast
Tuesday: Mainly sunny with no precipitation. Moderate outflow (easterly to northerly, low elevation) winds easing. Freezing level around 700m during the day and valley floor at night. Warm alpine temperatures.Wednesday: Light precipitation as a weak system approaches the coast late in the day. Light southerly winds. Freezing level rising to around 1000m. Thursday: Moderate precipitation associated with a frontal band is forecast, with some uncertainty about amounts and timing. Light to moderate south-west winds. Freezing level rising to around 1500m.
Snowpack Summary
Strong winds from the east and south-east have created new slabs at treeline and above. Temperatures have been unseasonably warm, leading to moist or wet weak surface snow conditions. Where a re-freeze has occurred, a crust now exists. Recent storm snow appears to be well settled. A facet layer buried on Jan 20th still exhibits hard, sudden planar results in isolated snowpack tests. It's about 120-150cm deep in the snowpack. Cornices will be weakest during the heat of the day and have the potential to act as a trigger for deep avalanches on the slope below.