Ribagorza — Avalanche Forecast

Storm Slab

Above 2400m

Persistent Slab

Above 2200m

Wet Snow

Below 2600m

Problems extracted by AI from bulletin text. May be inaccurate.

Recent snowfall problems and wind slabs at higher elevations. Wet snow problems and basal slough avalanches. Precipitation is expected over the next few hours, with the snow level dropping to around 2000 meters, which may accumulate about 10-30 cm of new snow at higher elevations, locally more. Below about 2500 meters, much of the precipitation will fall as rain or very wet snow, so wet snow avalanches will remain likely on sufficiently steep slopes of any aspect, especially during showers. In general they will be small in size (falling hazard), in some cases medium (capable of burying a person), although some basal sloughing may occur on grassy slopes or smooth rock that could acquire greater magnitude. Above about 2500 meters, it is likely that the new snow will not bond well with the pre-existing snowpack, so purges of more dry recent snow may occur. In addition, with the southwest flow, some fragile wind slabs may form on north-facing aspects, which could collapse with the passage of a single skier. Both types of avalanches will generally be of small size, or at most medium.

During yesterday’s day, significant precipitation was recorded in the mountain range, which in many areas has ranged around 30-50 l/m2, locally more than 70 l/m2, and fell as snow only in the high mountains. Thus, a few centimeters of new snow have been able to accumulate above about 2600 meters, while at lower elevations the snowpack has continued to be involved in melt and wetting processes, as has been happening for days. The snowpack shows some continuity at higher elevations, although the sunny slopes are quite devoid of snow up to considerable altitudes, and rocky outcrops are frequent on shady slopes. Despite this, due to the heavy snowfall recorded this season, snow depths are still significant above 2200-2400 meters, where they reach 40-100 cm in some locations. The snowpack consists of very dense old snow, and rounded grains predominate, with some crusted layers interspersed within. Given the precipitation expected for today, above about 2400-2500 meters a few more cm of drier snow may be deposited, which may not bond well with the previous snowpack.