Cornices
N
NE
E
SE
S
SW
W
NW
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Possible - Likely
- Dimensione
- 1–2.5
Cornices are reported to be large and several cornice failures have recently been noted.
Bollettino valanghe
Vedi sulla mappaLizard-Flathead
Apr 7 – 8, 2018Avalanche Canada
Archiviato · scaduto 8 years ago
Pericolo valanghe
Mon
Tue
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
In sintesi
New snow, strong winds and rising freezing levels are increasing avalanche danger for the forecast period. Choose conservative terrain and be especially wary of overhead hazards as the day warms or the sun shines.
Problemi valanghivi
Storm Slabs
NNEESESSWWNW- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Likely
- Dimensione
- 1–2.5
New snow and strong wind will form storm slabs at all elevations. Expect these slabs to be touchy as freezing levels begin to rise following the storm. Watch for moist or wet snow releases at lower elevations and on sun exposed slopes.
Confidence
Moderate - Timing, track, or intensity of incoming weather system is uncertain
Weather Forecast
TONIGHT: Cloudy, flurries. Accumulation 10-15 cm. Ridge wind strong, west. Alpine temperature near -5. Freezing level 500 m.SUNDAY: Cloudy, flurries. Accumulation 2-5 cm. Ridge wind strong, west. Alpine temperature near -2. Freezing level 1800 m.MONDAY: Mostly sunny. Ridge wind moderate, west. Alpine temperature near 0. Freezing level 2100 m.TUESDAY: Increasing cloud. Ridge wind moderate to strong, southwest. Alpine temperature near +4. Freezing level 2600 m.
Avalanche Summary
Numerous small slab avalanches have been reported in the top 10-30 cm of snow all through this week. It appears as though moderate amounts of new snow with just the right amount of wind have continuously set up thin, but touchy wind slabs in a variety of places. While these have been mostly small (size 1-1.5), a size 2 wind slab avalanche was reported near Fernie on Wednesday morning on a northeast aspect at approximately 2000 m. On Friday skier's reported a close call on wind-loaded slope on a southeast aspect at 1940 m. Read their MIN report here.Also on Friday, explosive control work produced wind slab and cornice releases up to size 2 in alpine terrain.Thursday in the Elkford area, recent small (size 1) loose/dry avalanches were reported on northerly aspects while loose/wet were observed on solar aspects.
Snowpack Summary
20-30 cm storm snow sits above a variety of crusts on all but high north aspects. Wind has formed isolated slabs in lee features, and in some cases snow may be poorly bonded to the crusts.There are some reports of a surface hoar layer roughly 80 cm deep on north aspects at treeline, but no recent avalanche activity on this layer. A layer of sugary facets around a crust exists near the bottom of the snowpack, but this layer has been inactive for some time.