Cornices
N
NE
E
SE
S
SW
W
NW
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Possible
- Taille
- 2–3
Cornice failures are still being noted periodically on West aspects 2500-2800m.
Bulletin d’avalanche
Voir sur la carteJasper
Apr 28 – 29, 2017Parks Canada
Archivé · expiré 9 years ago
Danger d’avalanche
Sun
Mon
Alpin
Sans niveau
Limite forestière
Sans niveau
Sous la limite
Sans niveau
Points saillants
Spring conditions are here and fine skiing can be found at all elevations. Pay close attention to the freezing levels and plan to finish your day before the afternoon avalanche cycle starts.
Problèmes avalancheux
Loose Wet
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Likely
- Taille
- 1–2
Freezing overnight temperatures decrease the danger in the morning until it warms up increasing the hazard. Most widespread during the late afternoon on solar facing slopes. Sluffs from rocks can trigger large slides once the snow is wet.
Deep Persistent Slabs
NNEESESSWWNW- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 2–4
The deep instability is well bridged by a solid mid-pack; however, it could be triggered by a cornice failure.
Weather Forecast
With the Jet Stream to the South cool temps dominate through the weekend. With freezing levels descending to the valley bottom snowpack overnight recovery will be good on Saturday morning. Over the weekend this will remain at 1,600m. Rain at lower elevations and snow in the alpine over the weekend.
Snowpack Summary
On Northerly facing slopes above treeline up to 20 cm of loose new snow sits over a well consolidated upper snowpack. Melt freeze crusts are ubiquitous to treeline above which their distribution narrows to solar slopes up to 2600m. The mid-pack is consolidated and bridges the weak base. Winter conditions exist in the high alpine on Northerly slopes
Avalanche Summary
Avalanche activity will increase with thermal inputs such as rain, direct solar radiation and daytime warming. After a good nights freeze the danger will gradually increase during the day and peak from14:00 until sundown. Likely trigger spots close to rocks, off cliffy terrain and shallow snowpack areas.