Avalanche Bulletin
更新日時: 2025/03/15 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Fair Limited observations
Treeline Fair Limited observations
Below Treeline Fair Limited observations
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
The new snow will provide greatly improved skiing and riding conditions however the bond of the new snow to the old surfaces should be monitored carefully. Windslab in the alpine and treeline elevation bands is the primary concern today. Look for signs of surface tension and slab development particularly at run entry points, just below ridge crest and on the back of convex rolls. The storm slab should also be monitored and may become more reactive as day time heating brings temperature near or above 0C.
Avalanche Problem
ウインドスラブ Wind slab
NW winds during the storm cycle have built windslab on leeward slopes in the alpine and treeline zones.
ストームスラブ Storm slab
Rising temperatures and high humidity will activate the storm slab particularly at lower elevations and on aspects where the storm snow overlies a crust.
全層雪崩 Glide slab
Despite a return to cooler temperatures, moisture is still trickling through the snowpack and glide avalanches remain possible. Glide avalanches are difficult to predict and can release unexpectedly.
概要
Avalanche
No new avalanches have been reported in the past 24 hours however we have limited recent observations in the region.
Snowpack
10-15cms of snow fell overnight bringing the storm total to ~30cms. The new snow has fallen on a variety of surfaces with previous melt freeze crusts extending above 1000 meters on solar aspects and up to 800 meters on polars. Moderate to strong NW winds through the storm have re-distributed the storm snow and built windslab on leeward slopes. The mid and lower snow pack are well consolidated.
Weather
A deep low to the NE of Hokkaido draws a NW flow across the region as a high pressure system moves into the region from the West. Winds are expected to be light NW with a chance of strong gusts. Valley temperatures will rise to a high of +2C with overcast skies and a chance of the occasional snow shower.
