Avalanche Bulletin
更新日時: 2024/03/15 06:00
Myoko
Alpine Low Pay attention to solar radiation during the day
Treeline Low Note rising temperatures and solar radiation during the day
Below Treeline Fair Note rising temperatures and solar radiation during the day
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a day to watch for unstable snow remaining in certain terrain at higher elevations. The recent snow is in the process of stabilizing, but be very careful in areas where wind slabs are forming. Notice slab formation by the condition of the snow surface and the feel of the snow underfoot. Wind slabs over time will increase in hardness and may give you the impression that they are stable. But don't trust it. Be especially aware of slab formations on terrain with no underlying support, such as convex or isolated terrains, and avoid such areas. Very high temperatures above yesterday's are in the forecast. Watch for wet snow avalanches in the afternoon. The weather will be stable and it will be a good day for climbing and skiing. Don't forget sunscreen and plenty of water. Have a good day.
Avalanche Problem
ウインドスラブ Wind slab
The westerly winds became very strong yesterday afternoon (14th), moving the most recent snow to the leeward side. Imagine slabs on dry soft snow on the north side and on Melt-Freeze crusts on the south side. And if you notice a wind slab, avoid it. Ski cuts are not suitable.
点発生湿雪雪崩 Wet Loose snow
Ratings are as of morning. Be careful of snow changes during the day on steep slopes where the effects of high temperatures and solar radiation are strong.
持続型スラブ Persistent slab
The danger of persistent slabs from ice layers or Melt-Freeze crusts formed by the February 21 rainfall and faceted snow that formed on top of them remains highly uncertain.
概要
Avalanche
Yesterday (14th), size 1 wind slab avalanches were reported. Numerous snowballs were also observed, partly due to high temperatures during the day.
Snowpack
Snow from the recent snowfall on the snowpack surface is sintering, partly due to yesterday's high temperatures. At higher elevations, where the snow is still dry, wind slabs are forming due to the strong winds of yesterday afternoon.
Weather
The Japan Meteorological Agency is forecasting a southerly, then westerly wind, slightly clearing, with a daytime high of 17 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -3 °C (as of 4:45 a.m.), with no new snowfall in the past 12 hours.
