Avalanche Bulletin
更新日時: 2025/02/20 05:00
Niseko Yotei Yoichi Shiribeshi
Alpine Low Observations from the alpine have been limited during this latest storm cycle.
Treeline Low
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
High volumes of new snow and limited observations in the alpine during the previous few days have resulted in uncertainty in the forecast requiring the need for further investigation. With over 100cm of new snow in the north of the region and strong north westerly winds we expect wind slab to have formed on lee slopes and be reactive. Early indications suggest the latest new snow has bonded poorly to the previous snow surface and is reactive to human triggers. Reducing your exposure to large terrain features is recommend today until further information is gathered on the latest storm snow in the north of the region.
Avalanche Problem
ウインドスラブ Wind slab
Over a 1 metre of new snow has fallen during the latest storm period in the north of the region. Strong north westerly winds will have transported this storm snow onto lee slopes creating slab which will be reactive. A high degree of danger exists for human triggered avalanches today.
ストームスラブ Storm slab
Storm slab activity is expected in the north of the region where a high volume of recent snowfall has bonded poorly to the previous snow surface.
点発生乾雪雪崩 Dry Loose snow
In steep terrain human triggered loose dry avalanches are likely to be triggered.
概要
Avalanche
Numerous size 1 slab avalanche have been recorded across the region on easterly aspects in the previous few days.
Snowpack
Over a metre of new snow has fallen in the North of the region with storm snow totals tapering to the south. This latest new snow appears to have bonded poorly to the previous snow surface. Strong north westerly winds will have redistributed the storm snow onto less aspects at higher elevations creating wind slab. In sheltered areas, storm slabs will have formed and be reactive.
Weather
A break in the latest storm cycle is expected in the morning. Winds are forecast to be moderate from the north with snow fall increasing in the afternoon.
