Keep an eye out for rising temperatures and strong solar radiation. Start early and finish early to avoid the highest hazard period, early afternoon through to dark.
Cornices will wake up with increasing temperatures, solar radiation and, will likely trigger deeper instabilities on the slope below. If you must travel near or below cornices, use good travel techniques and group management to reduce your exposure.
Forecasters are noting an increase in activity; seeing many larger slides, stepping down to ground or ice. Shallow snowpack areas would have the increased potential for human triggering.
Deep persistent slabs are best managed by:
Cornices are best managed by:
A wonderful blocking ridge over Northern BC and Alberta will cycle the first real kiss of spring conditions into the whole region, including the Icefields Parkway. Positive daytime temperatures, light winds, strong solar and rising freezing levels to as high as 2500m can be expected daily, and for the near future.
Varied surface conditions though the region. In the Icefields, the mid-pack is firm and bridging a weaker, lower snowpack. Shallow regions like Maligne, and all BTL locations are susceptible to wide, diurnal temperature swings (up to ~30 degree temp. difference), making for extremely weak, wet, hazardous conditions, especially on any solar aspects.
A few cornice failures in the Whistlers area observed pulling deeper slabs. One notable, large avalanche running to ground off the north face of Manx Peak. These are good reminders that large slab avalanches up to size 3 are still occurring within the bulletin region from the alpine, traveling well into TL and BTL terrain with momentum.