Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible - Likely
- Größe
- 1–2
Winds are expected to redistribute recent storm snow into slabs in the lee of ridges and ribs.
Lawinenlagebericht
Auf der Karte ansehenSouth Coast
Dec 28 – 29, 2014Avalanche Canada
Archiviert · abgelaufen 12 years ago
Lawinengefahr
Tue
Wed
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
Kernpunkte
Good weather for backcountry travel, but stay alert to variable avalanche conditions.
Lawinenprobleme
Persistent Slabs
NNEESESSWWNW- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible
- Größe
- 1–3
A touchy layer of buried surface hoar crystals has been responsible for numerous small avalanches over the past few days.
Confidence
Fair - Due to the number of field observations
Weather Forecast
Cold and dry with moderate to strong N-NE outflow winds. A temperature inversion may form on Tuesday/Wednesday.
Avalanche Summary
On Friday, several size 1 avalanches were triggered by snowmobilers below treeline in the Coquihalla area. These are likely to have failed on the mid-December surface hoar layer down about 50cm. On Wednesday skiers reported whumpfing in the Coquihalla area. A week ago, storm slabs up to size 2.5 being remote-triggered from flat areas up to 75 m away in the Coquihalla area between 1600 and 1900 m elevation. Slabs were 40-70 cm thick and were releasing on the mid-December surface hoar layer.
Snowpack Summary
New wind slabs are developing above a layer of buried surface hoar. A deeper layer of surface hoar from mid-December is buried about 60 cm down. The mid-December surface hoar layer is becoming harder to trigger, but snowpack tests are still showing that it has potential for wide propagation. It appears to be most reactive in sheltered treeline locations and may not exist across the entire region. A thick rain crust exists lower in the pack.