Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–5
Storm slab avalanches may step down and release the weak buried surface hoar layer. Avoid steep unsupported terrain features.
Avalanche forecast
View on mapKootenay Boundary
Dec 16 – 17, 2012Avalanche Canada
Archived · expired 14 years ago
Avalanche danger
Tue
Wed
Alpine
4 · High
Treeline
3 · Considerable
Below
2 · Moderate
Highlights
Avalanche problems
Storm Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely - Very Likely
- Size
- 2–5
The new storm is expected to develop a thick slab on all aspects and at all elevations. Recent light snow may also be transported by forecast strong Southwest winds into deep wind slabs on North thru East aspects.
Confidence
Fair - Forecast snowfall amounts are uncertain on Monday
Weather Forecast
Overnight and Monday: A Low pressure system is moving into the region from the coast on Sunday evening. This system is expected to bring 15-20 mm of precipitation by late Monday morning. With the cool alpine temperatures, this may be 20-30 cms of light snow at higher elevations. Strong SW winds during the storm are expected to become strong NW after it passes to the East.Tuesday: No precipitation is expected. Alpine temperatures are expected to be -12.0 combined with strong NW winds.Wednesday: Continued dry and cold in the morning with light winds. In the afternoon or evening the next system should move in from the coast.
Avalanche Summary
No new avalanches reported. Some sluffing from steep terrain in the Kootenay Pass area.
Snowpack Summary
New snow combined with light winds formed some very soft slab on all aspects. The recent storm snow has not consolidated into a slab. Forecast strong winds and more new snow should create storm slabs on all aspects and at all elevations. The late November surface hoar layer that is buried down about 50 cms may be reactive in the Rossland Range with added load from the storm.