Avalanche Forecast
Issued: Jan 3rd, 2015 4:00PM
The alpine rating is Persistent Slabs and Wind Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeWe are at a tipping point in the Little Yoho region. 20+cm has added enough load over the Dec 18th layer to be a real concern to back country users. This is especially true in any wind affected area. SH
Summary
Weather Forecast
Snow will taper off for Sunday, with light NW winds and lows in the -20's. Another 10-15cm is possible on Sunday into Monday night with moderate West winds accompanied by warmer temperatures.
Snowpack Summary
The main issue currently is the Dec.18 layer which is down 35-50 cm and sits on a crust/surface hoar combination at elevations below 2100 meters and on a facet/surface hoar combination at higher elevations. In places below 2100m there is a melt/freeze crust up to 10cm thick with surface hoar above. Wind slabs have been encountered in alpine areas.
Avalanche Summary
No new avalanches have been observed or reported.. Over the last few days, many features starting to slab up with wind effect have been producing "whumpfs" over the dec 18th layer at treeline and above
Confidence
Problems
Persistent Slabs
The Dec 18 interface is down 35-50 cm and is producing easy to moderate results with field tests. There is likely enough load for human triggering to increase on this layer.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
Wind effect on Friday has created small wind slabs in lee alpine terrain.
Aspects: North, North East, East, South East, South.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Jan 4th, 2015 4:00PM