Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Unlikely - Possible
- Tamaño
- 1–2
Lee aspects of ridgetops and terrain features should be carefully evaluated for windslabs.
Boletín de aludes
Ver en el mapaJasper
Feb 21 – 22, 2014Parks Canada
Archivado · caducó 13 years ago
Peligro de aludes
Fri
Sat
Alta montaña
2 · Moderado
Límite del bosque
3 · Notable
Bajo el límite
1 · Débil
Lo esencial
Pay attention to changes in the snow as you approach treeline and travel through the lower alpine where terrain features have slabs on their lee aspect.
Problemas de aludes
Persistent Slabs
NNEESESSWWNW- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Unlikely - Possible
- Tamaño
- 2–3
This persistent weak layer consists of facets and surface hoar that were covered. It sits on a mixture of crusts and firm supportive snow. This seems to be of most concern at the Treeline and lower alpine elevations between 2000m and 2400m.
Weather Forecast
Light snow flurries may sporadically spread 5 - 10cm over the forecast area overnight. Cloudy skies and occasional flurries will continue through the weekend with a clearing trend beginning on Monday. This could arrive earlier or stall for a few extra days of clouds.
Snowpack Summary
Light snow flurries overnight did not add much load to the snowpack. There is about 30cm overtop of the Feb 10 interface which has surface facets and surface hoar from the previous cold weather. This seems to be most prevalent from treeline into the lower alpine elevations. Below tree line there is a supportive yet shallow mid-pack over facets.
Avalanche Summary
No new natural avalanches were observed in the icefields area today. Wednesday's patrol in the Maligne area produced a size 2 slab that was :35m wide, 60m long, on a NE aspect 38 degree slope just above treeline on the Feb 10 surface hoar/facet layer. Stability tests showed moderate sudden planar/sudden collapse on this layer.