Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible
- Dimensione
- 1–2
Slabs lee to previous N winds may still fail on a persistent interface (facets over a suncrust) down 15-40cm.
Bollettino valanghe
Vedi sulla mappaJasper
May 1, 2019Parks Canada
Archiviato · scaduto 7 years ago
Pericolo valanghe
Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
In sintesi
New snow may hide previously obvious windslabs on solar aspects. Facets and upper snowpack crusts persist on all aspects.
Problemi valanghivi
Persistent Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible
- Dimensione
- 1.5–3
Cool temperatures mean little change for this problem; triggering remains possible in the alpine. Crusts in the upper snowpack, and deeper facet layers warrant further investigation.
Weather Forecast
Snowfall arriving. Forecast models disagree on amounts(5-35cm by the weekend), but align more on winds (light-moderate Westerlies) and freezing levels.
Weds: Cloud, light snow developing. Freezing level 1600m, treeline high -4, light-mod Westerlies.
Thur: Overnight snow eases to flurries. Freezing Level 1900m, Treeline High -2. Light winds.
Snowpack Summary
Wind Slabs lee to N winds linger over sun crusts on solar aspects in the alpine, and in wind-prone treeline areas. Low density cold snow remains in wind/sun sheltered terrain, particularly in Easterly ranges and near the Icefields. A buried facet layer on shady alpine slopes remains a concern; giving easy/sudden test results just SW of our region.
Avalanche Summary
No patrol Tuesday. To the South of our region (Bow Summit), 2 large (size 2 - 2.5) persistent slabs were remotely triggered on alpine SW aspects Tuesday. On Sunday, 1 Large (sz 2.5) Persistent slab was observed in the Maligne Range on an East aspect, in convex alpine terrain.
Confidence
Forecast snowfall amounts are uncertain