Avalanche Bulletin
for Sunday, 17.02.2019
(published: Saturday, 16.02.2019 at 4:33 pm)
german version
Daytime danger cycle!
Avalanche Danger
Avalanche danger rises from low to moderate during the course of the day. In early morning, favourable conditions reign. Due to rising temperatures and the impact of solar radiation, wet slab and loose-snow avalanches can be expected to trigger naturally during the afternoon in steep, rocky and rough terrain. Avalanche prone locations for slab releases (also wet ones) are found on north-facing, extremely seteep slopes above about 2000 m in transitions from shallow to deep snow, e.g. at the entrances into gullies and bowls. Glide-snow avalanches can release at ANY time of day or night.
Snow Layering
Older snowdrift accumulations lie on shady slopes atop a hardened, sometimes icy old snowpack at high altitudes. At low and intermediate altitudes the snowpack was able to settle. At these altitudes during the nocturnal hours, a melt-freeze crust forms which is not always capable of bearing loads. The base of the snowpack is quite stable, only in the southern mountain ranges (south of the Mur-Mürz rift) is expansive snow crystal metamorphism (faceting) deteriorating the snowpack and weakening it. On Saturday, depending on altitude and aspect, the snowpack became either moist or thoroughly wet. On Saturday night, the snowpack surface will consolidate again.
Alpine Weather Forecast
A high pressure system continues to determine weather conditions in Styria. It will be sunny and mild in the mountains. Winds will almost non-existent. On Monday at 2000 m: +5 degrees and sunny all day long.
Short Term Development
Be attentive of the daytime danger cycle.

The next Avalanche Bulletin will be published on Sunday at about 6:00 pm.
Arnold Studeregger
Translated by Jeffrey McCabe, www.creativtrans.com