Avalanche Bulletin
更新日時: 2025/01/30 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Low There were limited observations from Above the tree line yesterday. Conditions are changing rapidly today. The Hazard will continue to rise today, a high degree of uncertainty exists.
Treeline Low Conditions are changing rapidly today. The Hazard will continue to rise today, and uncertainty exists.
Below Treeline Fair New snow on a variety of old snow interfaces is increasing the likelihood of new avalanches today.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a day of increasing danger depending on future weather changes. Fresh snow is scarce, but where it is carried, it will be enough to wash people away. Please continue to follow the principled course of action: recognize avalanche terrain and stop in safe areas. Also, be careful skiing, as there are many hard slopes hidden under the new snow.
Avalanche Problem
ストームスラブ Storm slab
Wind and storm slabs are possible today as ridge top winds transport the snow and new snow falls today.
点発生乾雪雪崩 Dry Loose snow
The dry loose problem is isolated to terrain greater than 38degrees in steepness.
概要
Avalanche
No new avalanches were reported yesterday
Snowpack
Yoichi area received significantly more snow overnight and yesterday with 19 cm reported at Otaru with the Kiroro webcam showing 10cm new snow since yesterday evening. Kutchan has only received 5cm in the last 24 hours. The winds on top of Annupuri this morning are around 7 meters per second and gusts about 15 meters/ second from the NW and have decreased slightly overnight. Uncertainty exists with how this new snow load will bond with the old snow interface. The old surface is highly variable with Melt Freeze crusts on the solar and buried surface hoar and surface facets on the polar aspects. New snow often fails within the new storm snow. Mid and lower snow packs are well bonded but are gliding slowly down hill opening glide cracks.
Weather
Low pressure NE of hokkaido brings cold moist NW flow. Today and tonight: Snow, heavy accumulation rates at times. NW winds Light to moderate with stronger Ridgetop wind gusts. Freezing level at the surface with day time highs around -4C at tree line.
