Large natural wet avalanches are occurring today in Logan Canyon and at lower and mid elevations across the zone, prompting an update to HIGH danger.

Rain saturated the low elevation snow, natural sluffing occurred yesterday afternoon and probably continued overnight on steep low elevation slopes. Significant loose wet avalanches involving saturated soft snow are likely today on steep slopes below the elusive rain/snow line... Dangerous wet slab avalanches are possible in some low elevation areas with poor snow structure.

Triggered wind slab avalanches up to around 2 feet deep are likely at upper elevations today, and natural activity is possible, as significant drifting from strong and sustained west winds continues. Fresh and sizable wind slabs were deposited overnight on the lee sides of ridges, cross-loaded along sub-ridges, and they formed in and around terrain features like rock outcroppings, gullies, scoops, trees, and saddles. Beware the growing ridge-top cornices, which could break further back than you expect and today are likely to trigger wind slab avalanches on drifted slopes below. Avoid obvious and historic avalanche paths and stay off of and out from under steep drifted slopes.

***Persistent and/or deep slab avalanches are possible on drifted slopes in outlying areas with shallow weak snow.

Soft storm slabs and long running sluffs involving the storm snow are likely, especially on steep upper elevation slopes with significant accumulations of heavy new snow. Storm slabs may fail on weak small grained sugary snow that was on the surface last week called near surface facets, or on feathery frost crystals called surface hoar, which formed during last week's high pressure and may have been buried intact on some slopes.