Avalanche Bulletin
更新日時: 2024/12/17 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Low Limited alpine observations reduce our confidence in the alpine rating.
Treeline Fair Limited observations at treeline reduce our confidence in the TL rating
Below Treeline Good
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Heavy snow across the zone for the past 48 hours brings heightened avalanche risk as the new snow needs time to settle. The alpine and treeline zones have also been affected by moderate WNW winds causing even more loading on leeward slopes. The BTL is just reaching threshold however the snowpack remains unconsolidated with challenging travel at low elevations. Early season hazards exist across the zone including trees, roots, rocks, open creeks and many areas of particularly unconsolidated snow. The new snow also brings the risk of snow immersion hazards so make sure you ride with a friend, within your ability and be cautious of the many hazards.
Avalanche Problem
ウインドスラブ Wind slab
Moderate to strong west winds combined with the recent snowfall has caused windslab to develop on leeward slopes.
ストームスラブ Storm slab
Cool temps combined with dry snow have mostly prevented slab formation however this may change today as the storm subsides and the new snow settles.
点発生乾雪雪崩 Dry Loose snow
Steep sheltered slopes protected from the West wind have received significant amounts of new snow and loose dry avalanches can be expected in this terrain.
概要
Avalanche
No new avalanches have been reported in the last 24 hours however observations remain limited and the weather has prevented most alpine travel.
Snowpack
15-30cms of overnight snow added to 30cms during the day yesterday bringing the settled storm total to ~60cms since the cycle began on Saturday Dec. 14. The low density storm snow overlies a consolidating base of new snow increasing in density down to a deteriorating crust at the ground / sassa interface. No notable weak layers have been found in the snowpack.
Weather
The wind has eased off but is forecasted to remain moderate from the West. Snowfall is also expected to continue today but with less intensity than earlier in the storm. Temperatures will remain steady and cool with a high of -5C in the valley.
