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Report
Wed. 25.04.2018
update yesterday 17:37 (Bernhard Niedermoser - translated by Jeffrey McCabe)

Springtime situation: depart early or start out high up

Afternoon

Morning

Melt-freeze crusts, corn snow, stable in the early hours of the morning. Timing is everything. At 10-11 o’clock at latest in all aspects below 2800 m, the snow breaks through or breaks apart. In extremely steep terrain, naturally triggered wet-snow and gliding-snow avalanches are possible. Above 2800 m, still stable. No further danger levels assigned to the grassy mountains.

Avalanche Danger

Avalanche danger in the morning on Wednesday is LOW, rises to MODERATE over the course of the day, to CONSIDERABLE in the Hohe Teuern. In the inneralpine grassy mountains, worthwhile skiing tours are no longer possible. What remains is stable summer corn snow, thus, no further danger levels will be assigned to this region.

Depending on aspect and altitude, corn snow develops (and deteriorates) more or less rapidly. Favourable times for skiing descents are between 9 and 10 o’clock, slightly later on west and north-facing slopes. Possible dangers: gliding avalanches from the ground, wet loose-snow avalanches primarily at 2400-2800 m, small-to-medium in size, isolated large-sized releases in the Hohe Tauern.

Snow Layering

The snow is disappearing rapidly, losing its substance, including as regards potential avalanche size. Within one week, snow depths below 2400 m have decreased by 40-70 cm. There are three altitude levels to distinguish:
A. Below 2400 m the moist snow is stable by and large, many avalanches have already released. For more avalanche activity, heavy and persistent rainfall would be necessary. Unexciting summer corn snow often dominates. B. At 2400-2800 m is currently the most active avalanche zone, although it has diminished significantly over the last few days. Large-sized releases are possible in extended northern aspects.
C. Above 2800 m the snowpack is relatively stable, on shady slopes it is dry.

Alpine Weather Forecast (ZAMG Salzburg)

Star-studded skies on Tuesday night.

Beautiful, sunny weather on Wednesday. In the afternoon, harmless convective clouds will join the sunshine. At high altitudes in the Northern Alps, westerly winds will be blowing at 30-40 km/hr; foehn wind is expected on the Main Tauern Ridge. At 2000 m: 6 to 11 degrees; at 3000 m: -1 to +2 degrees.

Wednesday night will be increasingly overcast. On Thursday the peaks will be hidden in cloud, rainfall and snowfall are anticipated. Above 1800-2200 m a few centimeters of fresh snow is possible. Brisk NW winds, causing temperatures to drop during the day. At 2000 m: from +2 dropping to -1 degree; at 3000 m from -2 to -4 degrees.

Short Term Development

On Thursday unfavourable conditions are expected, since the snowpack below 2400 m will be soft from early morning and visibility will be poor in general. Friday promises far better conditions. Following a night of clear skies, melt-freeze crusts and corn snow can again be expected in the early hours.





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