Avalanche Forecast
Issued: Apr 7th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs, Loose Wet and Cornices.
Stephen Holeczi,
Likely a poor freeze Friday AM, and it is hard to estimate the danger ratings for these conditions. Watch locally for how much freeze occurs and for wind slabs in the alpine. Cooler temperatures are coming next week which should improve conditions.
Summary
Weather Forecast
There will likely be a poor freeze overnight into Friday with a slight temperature inversion. Alpine winds will increase into the strong range, weakening over the course of the day. Timing us uncertain, but snow will begin as the passage of a cold front moves in mid-day. So far 5-15cm is expected. Cooler temperatures arrive Friday night onward.
Snowpack Summary
15-20 cm of soft, dry snow sits on a firm crust on N aspects down to at least 2000m. On solar aspects a series of crusts exist in the snowpack at all elevations, starting to break down on Thursday with warming. Windslabs exist in immediate leeward areas of ridges, and are still capable of being triggered.
Avalanche Summary
FIeld trip near Sunshine Village on Wednesday observed a size 1.5 windslab/cornice on a SE aspect and a fresh cornice failure on the N side. Some other reports from Lake Louise backcountry and below the Bow Hut in last 24 hours of wind slabs being triggered up to size 1.5 in the alpine.
Confidence
Timing, track, or intensity of incoming weather system is uncertain on Friday
Problems
Wind Slabs
Windslabs exist near ridge crests, and will likely stay sensitive with warm temperatures and incoming snow. Pay close attention near ridges and entrances to ski lines.
- Use caution in lee areas. Recent loading has created reactive slabs.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Loose Wet
There is uncertainty about how the snowpack will react to a poor freeze. Backcountry users will have to monitor this locally on their trip.
Aspects: All aspects.
Elevations: Treeline, Below Treeline.
Likelihood
Expected Size
Cornices
Cornices may become more sensitive to triggering or falling off while the temperatures stay warm over the next 24 hours. This is a big consideration if the trip you are considering has overhead exposure to them.
Aspects: North, North East, East.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 8th, 2022 4:00PM
