Avalanche Forecast
Issued: Apr 28th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Loose Wet, Deep Persistent Slabs and Cornices.
TT,
Avalanche Canada
This weekend will be a beautiful time to enjoy recreating in non-avalanche terrain, or in controlled areas like a ski hill.
Summary
Confidence
High
Avalanche Summary
Several deep persistent slabs and several loose wet avalanches were observed from the icefields parkway Thursday.No patrol on Friday but widespread natural loose wet avalanche observed from Jasper townsite.
Post avalanche observations to the MIN.
Snowpack Summary
Multiple melt-freeze and sun crusts exist in the upper snowpack on all aspects and elevations except true north facing alpine slopes. As alpine temperatures reach double digits, these crusts are losing cohesion and amalgamating into a moist surface snow. A crust/facet PWL lingers in the mid-pack in many areas at tree line and above. The main concern is the depth hoar and basal facets at the base of the snowpack.
Weather Summary
A dramatic rise in daytime temperatures and strong solar radiation is forecasted for the next several days. There is also forecasted to be warm air trapped at higher elevations overnight, so don't let cool early mornings at valley bottom mislead you into thinking there has been a good overnight freeze.
Terrain and Travel Advice
- Only the most simple non-avalanche terrain free of overhead hazard is appropriate at this time.
Problems
Loose Wet
Warming temperatures will continue to produce wet loose avalanches.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Deep Persistent Slabs
Likelihood
Expected Size
Cornices
Cornices will become increasingly unstable as the warm weather continues, and will likely act as triggers for the deep persistent slab problem.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Apr 29th, 2023 4:00PM
