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Report
Mon. 16.04.2018
update 15.04.18 18:19 (Bernhard Niedermoser - translated by Jeffrey McCabe)

Attention: a day of avalanche activity

Afternoon

Morning

Due to lacking outgoing nocturnal radiation and rain showers, conditions on Monday are unfavourable. Below 2700 m, heightened avalanche activity can be expected. Avalanche danger will rise during the day. In Hohe Tauern is the most snow, danger will rise to CONSIDERABLE; elsewhere to MODERATE. Numerous gliding-snow and wet-snow avalanches can be expected.

Avalanche Danger

Avalanche danger on Monday will be MODERATE from the start and increase by the hour. At midday at latest, danger will be CONSIDERABLE, especially in the Tauern.

WET SNOW: Likelihood of naturally triggered avalanches (gliding snow, wet snow) will rise already in the morning. Many avalanches will be small-to-medium, some will probably be large. All aspects are at risk below 2300 m; on E-S-W facing slopes below 2700 m. In extremely steep terrain, wet loose-snow avalanches can be triggered by skiers.

SNOWDRIFTS: In high alpine regions above 2700 m, conditions are generally better, with relatively few avalanche prone locations for dry-snow slab avalanches on extremely steep, north-facing ridgeline slopes.

Snow Layering

The snowpack up to 2500 m is 0-degrees isotherm widespread, moist in the interior layers, wet below 1800 m. The process of slopes becoming bare of snow is unfolding apace. Within one week, 30-50 cm of the snowpack has been lost, most of which condensed in the foehn current. The activity area for gliding-snow and wet-snow avalanches is currently on north-facing slopes at 1700-2300 m; on south-facing slopes at 2100-2700 m. Above 2700 m the snowpack is currently rather stable.

Alpine Weather Forecast (ZAMG Salzburg)

On Sunday night, skies will be overcast. Occasional showers are possible, more likely in southern than in northern regions.

On Monday the peaks will often be hidden in fog. Intermittent rainfall can be expected. As of midday, thunder and lightning will make their appearance. Some snowfall is anticipated in high alpine regions. The southerly foehn, still strong in the morning hours, will collapse in the afternoon. Temperatures will drop a notch: at 2000 m, to 5 degrees; at 3000 m, to 0 degrees.

On Tuesday, visibility will be impaired by cloud, fog and rain. Snow will fall above 2500 m. Winds will be brisk from northerly directions. At 2000 m: +4 degrees; at 3000 m: -1 degree.

Short Term Development

Monday and Tuesday will be unfavourable due to lacking nocturnal outgoing radiation and intermittent rainfall. Stable springtime conditions will develop again starting on Wednesdasy or, at latest, Thursday. The latter part of the week looks good.





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