Loose Dry
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible
- Dimensione
- 1–1.5
Expect sluffing out of steep rocky terrain
Bollettino valanghe
Vedi sulla mappaJasper
Feb 9 – 10, 2019Parks Canada
Archiviato · scaduto 8 years ago
Pericolo valanghe
Sun
Mon
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
In sintesi
Human triggering remains a possibility. A strong, thick supportive mid-pack over the basal weakness is critical to safe travel, especially in shallow snowpack regions. Ice climbers should be wary of loose dry avalanches in gulleys.
Problemi valanghivi
Deep Persistent Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible
- Dimensione
- 1.5–3.5
Just a reminder, this is still there and can still be triggered from shallow snowpack areas. See avalanche activity summary.
Weather Forecast
Saturday will be cloudy, no precipitation, alpine temperatures high -20 C, and light East Ridge winds. Sunday will be sunny with cloudy periods, no precipitation, alpine temperature low -23 C and high -14 C with light ridge winds.A detailed mountain weather forecast is available from Avalanche Canada.
Snowpack Summary
50cm from Feb 2nd was followed by strong Northerly winds and cold temperatures. This snow overlies a dormant but persistent weaknesses of surface hoar, crusts, and/or facets. Cold temps have weakened the structure of the slab over this layer and it lays dormant, for now. A deep persistent basal facet/depth hoar weakness exists in shallow areas.
Avalanche Summary
On Feb 7th, 3 people were involved in a sz 2 in the Surprise Valley area of Maligne. This area is typically shallow and facetted with a weaker mid-pack. Slide was triggered in the basal weakness while traveling through the trees on a W aspect, 1950m, on a 30° slope. One member was fully buried and located and recovered by their partners.