Avalanche Bulletin
更新日時: 2023/01/12 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Fair During the latest storm cycle the winds has transported new snow onto lees slopes producing slab at higher elevations.
Treeline Good Rising temperatures in the coming days will raise the freezing level to around 1600 meters creating the possibility of loose wet activity in steep terrain.
Below Treeline Good Temperatures above zero degrees at lower elevations may produce loose wet activity.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
As temperatures and sunshine increase timing will be key to moving off solar aspects at lower elevations before the snow becomes too heavy. Numerous glide cracks have opened up across the region
Avalanche Problem
ウインドスラブ Wind slab
Winds slabs have formed and have been reactive at high elevations where the latest wind-transported storm snow overlies a buried crust on solar aspects.
点発生湿雪雪崩 Wet Loose snow
As temperatures rise over the coming days and we have a period of clear skies the snow surface may warm and backing less cohesive resulting in loose wet activity in steep terrain. Look for signs of roller balling as an early indicator that is occurring.
概要
Avalanche
On the 10th of January, a skier-triggered slab avalanche was reported on Mt Shiribetsu. This slab was released on an easterly aspect at a higher elevation on the new old snow interface.
Snowpack
New snow totals from the latest storm cycle are higher in the northern end of the region around Kiroro where up to 40cm of new snow has been recorded. Srong winds through out the early part of the week has transported this latest new snow onto lees aspects where a crust has formed on solar aspects. At lower elvations the latest the new snow has a density change crating variable condtions.
Weather
A high-pressure system moves across the country on Thursday resulting in clear skies and warmer temperatures with the freezing level increasing to 1600 meters.
