Bollettino valanghe

Jasper

Mar 18 – 19, 2015Parks Canada

Vedi sulla mappa

Archiviato · scaduto 12 years ago

Pericolo valanghe

Fri

Sat

Alta quota

2 · Moderato

Limite del bosco

1 · Debole

Sotto il limite

1 · Debole

Apri la mappa completa

In sintesi

Solar radiation will rapidly and dramatically increase the avalanche danger on exposed slopes, with maximum effect latter in the day.

Problemi valanghivi

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Unlikely - Possible
Dimensione
1–3
Soft slab conditions on lee alpine aspects appear to have bonded well in most locations. At 2400m a graupel layer marks the interface and may be below 65cm of wind blown snow from last week. This sheared with moderate force during field tests (18th)
Deep Persistent Slabs
N
NE
E
SE
S
SW
W
NW
Alta quota
Limite del bosco
Sotto il limite del bosco
Probabilità
Unlikely - Possible
Dimensione
2–3
Large cornices or surface avalanches are the likely trigger.

Weather Forecast

Cooling tonight with the freezing level rising to 1800m on Thursday and to 2100m on Friday. A westerly flow bringing snow flurries that may, by the weekend, provide another 20cm of snow in the alpine. Light wind will be south and westerly.

Snowpack Summary

Crusts exist up to 2200m on all aspects and extend higher on solar aspects. Above treeline wind slabs up to 65cm thick can be found in isolated locations. Bonding is generally good, however a graupel layer has recently been shown to shear with moderate force at the interface. Deeper weaknesses can be found near the base of the snowpack.

Avalanche Summary

No recent activity observed. A large cornice failure onto a easterly facing alpine start zone, known to be a frequent performer, failed to produce an avalanche. Limited older (>48hrs) size 2 activity from treeline and above is thought to have been triggered by solar radiation.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Friday

Regioni coperte

Jasper