Natural activity is tapering off, but uncertainty remains high. Approach terrain decisions with intention and allow for a margin of error.
Avalanche control is being conducted on Mt Stephen on Mar 31, 2025. This area will be closed.
A 90-150 cm slab of dense snow now sits atop the persistent mid-pack facet layer from Jan/Feb. There has been a lot of large avalanche activity on this facet layer, and where it is weak and hasn't yet avalanched, triggering it remains a concern.
Up to 25cm of settled storm snow buries previous crusts and winds slabs. This new snow could fail as a storm slab in steep terrain, and has potential to step down to deeper weak layers in the snowpack. Any significant solar inputs on Monday will increase the likelihood of these slabs being triggered.
This problem is driven by air temperature and solar input. The latest storm snow sits on a crust and could slide easily if conditions warm, especially under strong sun. Heat and solar input remain uncertain in the models, so monitor conditions closely at the local level on Monday.
No avalanches observed or reported in the Little Yoho forecast region today.
Up to 25cm of settled of storm snow has accumulated over the past three days. This new snow overlies rain and temperature crusts up to ~2500 m. A 90-150 cm dense slab now sits over a persistent weak layer of facets from Jan/Feb. The facets are rounding but are still a concern, especially in areas with a thinner snowpack. In most areas the lower snowpack is well settled. Below 1500 m the snowpack is becoming isothermal.
Light southerly winds will persist through Monday. Temperatures will remain seasonal or slightly cooler, with valley highs just above zero in the afternoon and ridge temperatures near -9°C. A minor system is expected to bring less than 5 cm of precipitation late Monday into early Tuesday.
