Avalanche Forecast
Issued: Nov 19th, 2013 4:17PM
The alpine rating is Wind Slabs, Storm Slabs and Loose Dry.
, the treeline rating is , and the below treeline rating is Known problems includeLots of snow is available for transport. Tricky conditions at higher elevations will exist until the snow has time to settle and bond to the layers below. SHÂ
Summary
Weather Forecast
It should dip below -20C tonight and alpine winds will shift to N/NW up to 65kmh for Wed. Thursday and Friday should only produce trace amounts of snow with slightly warmer temperatures.
Snowpack Summary
15-30cm over the last 24 hours, starting as dense snow which became lighter as temps cooled. Up to 50cm settled storm snow over the last few days. Many areas reporting less accumulation in the alpine. Moderate winds SW to NW creating wind slabs 20-50cm thick in the alpine, The basal Oct. crust can still be found on polar aspects in the alpine.
Avalanche Summary
Avalanche work at Sunshine produced avalanches to size 2 on many different aspects, one of which stepped down to the Oct. crust in a previously uncontrolled alpine area. Less snow reported at Lake Louise, and less activity seen. Limited visibility, but some naturals were observed to size 2.5 on Pilot Mtn. during a clearing.
Confidence
Problems
Wind Slabs
Stiffer wind slabs 20-50cm thick in exposed areas. NW winds Wed. will load SE slopes but expect to find these on numerous aspects.
- Use caution in lee areas in the alpine. Recent wind loading have created wind slabs.
- Be careful with wind loaded pockets while approaching and climbing ice routes.
Aspects: North, North East, East, South East, South.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Storm Slabs
Sunshine reporting a touchy storm slab interface down 40-80 cm. This needs time to bond to the previous surface below. Slides initiated on this layer could step down to basal facets or the Oct. melt/freeze crust where present.
- Use caution in lee areas in the alpine and treeline. Recent storm snow has formed touchy slabs.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Dry
Lots of snow available for transport and sluffing will be a major concern in terrain traps. Ice climbs below treeline such as Mt. Dennis will be prone to sluffing, especially if the winds pick up Wed.
- Be cautious of sluffing in steep terrain.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Nov 20th, 2013 4:00PM