Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible - Likely
- Dimensione
- 1–3
25cm HST and moderate SW winds have added to the windslab problem in the alpine and open tree-line features.
Bollettino valanghe
Vedi sulla mappaJasper
Feb 19 – 20, 2017Parks Canada
Archiviato · scaduto 10 years ago
Pericolo valanghe
Sun
Mon
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
In sintesi
http://www.pc.gc.ca/apps/links/goto_e.asp?destination=Special Public Avalanche Warning has been issued for Jasper National Park due to dangerous avalanche conditions. "The snowpack is touchy and even though it looks enticing, it is unforgiving right now" - CS
Problemi valanghivi
Deep Persistent Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Likely
- Dimensione
- 1–3
Widespread whumphing and shooting cracks in previously un-skied terrain. Recent natural activity up to Sz 3 failing on the weak faceted snowpack.
Confidence
Due to the number of field observations on Saturday
Weather Forecast
Light flurries over the next few days will accumulate up to 15cm of new snow. Temps to remain between -3 to -10 in the Alpine with light (1-25km/hr) SW winds. Freezing levels could go as high as 1600m on Sunday.
Snowpack Summary
25cm HST in the past 4 days along the Columbia Icefields and 35km/hr SW winds have built, yet another, layer of windslab TL and ALP. A rain crust (up to 20cm) exists below 1900m. The denser upper snowpack overlies a weak faceted lower pack, making for very tricky and dangerous avalanche conditions .
Avalanche Summary
A sz 3 slab released from a steep rocky area below ridgeline from Churchill South, NE aspect, 2500m elevation. Crown was ~100cm deep, 200m wide and traveled into the runout zone. A sz 2 released in a steep gully at treeline on Mt. Wilson today, dusting the highway.Widespread whumphing and shooting cracks were noted on all elevations.