Issued: Mar 28th, 2023 4:00PM
The alpine rating is Loose Wet and Deep Persistent Slabs., the treeline rating is , and the below treeline rating is Known problems include
Solar warming should primarily factor into your trip planning - avoid exposure to southerly slopes and cornices.
Elevated hazard rating at tree line reflects increasing freezing level and solar influence during peak warming- take advantage of the good overnight freeze by starting and finishing early.
Cornice failures and loose wet avalanches may increase in the late afternoons (~14:00) with clear skies, direct sun, and rising daytime freezing levels.
Don't forget to post avalanche observations to the MIN.
2-10cm of new snow through the region over a thin sun crust at all elevations on solar aspects. 20-50cm down is a persistent slab, within a variable strength mid-pack which bridges the basal facets and depth hoar at the base. The strength of the mid-pack is varied by aspect and elevation. Snow depth varies from 60-170cm.
Forecasts call for high freezing levels (up to 2000m) and increasing clouds beginning in the late morning, Wednesday. This should be the warmest day of the week. A mix of sun and cloud on Thursday with a continued diurnal temperature pattern.
Terrain and Travel Advice
- Cornices become weak with daytime heating or solar exposure.
- Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
Wet loose avalanches will likely initiate from steep rocky terrain on southerly aspects, and may be large enough to trigger deeper problems.
Aspects: South East, South, South West, West.
Elevations: All elevations.
Deep Persistent Slabs
The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar. Large triggers like cornices, and wet avalanches can step down to this deep persistent slab, present on all aspects, TL and above.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Valid until: Mar 29th, 2023 4:00PM