Avalanche Bulletin
更新日時: 2025/01/02 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Fair With rapid rates of new snow falling in the last 24 hoursin the Niseko area, slopes steeper than 35degrees need time to settle. In the last 24 hours, the Yoichi area has had less new snow and more time to begin to settle
Treeline Fair
Below Treeline Good At lower elevations the possible buried crusts are closer to the surface. Avalanches could be easier to trigger specially on steeper solar aspects in isolated areas
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
With the new snow needing time to settle, riders should take time to asses the snow before stepping out onto steeper slopes. If you step out, only expose one person at a time. Ask yourself, what will happen if the slope slides? Is there a gully or trees below you which could raise the consequences of an avalanche? Glide cracks are opening especially on the south facing slopes and maybe hidden by the light new snow. Brush and open creeks especially in the Yoichi area and north side Shiribetsu make for very challenging riding conditions.
Avalanche Problem
ストームスラブ Storm slab
With possible buried crusts closer to the surface, avalanches could be easier to trigger specially on steeper solar aspects below tree line.
ウインドスラブ Wind slab
Ridgetop gusts winds have been strong enough to transport snow and created possible wind slabs lee of ridge tops and have increased early this morning.
概要
Avalanche
# 1 Size 1 AB AK Face Kiroro
Snowpack
More than 30cm new 24 hour snow totals for Niseko area reported in Kutchan. Expect 60cm HN24 in the surrounding mountains. Light to moderate Northwest gusts at 10m/s top of Annupuri from the WNW. Lee slopes in the alpine could have even more 24 hour snow totals. On solar aspects at lower elevations this new snow fell on now buried melt crusts. Less new snow fell in the Yoichi area overnight and yesterday where more solar input and snow pack settlement happened. The mid and lower snow pack continues to settle and gain strength.
Weather
Cloudy skies with light snow continuing this morning. Air temperatures remain well below freezing. Light NW winds with moderate ridge top gust will slightly increase in the afternoon along with possible broken skies and less potential for afternoon snow. Higher amounts of new snow is forecasted in the greater Niseko area. More broken skies and sun expected in the Yoichi area.
