Avalanche Bulletin
更新日時: 2024/03/30 06:00
Myoko
Alpine Low Note the effects of rising temperatures and solar radiation during the day
Treeline Low Note the effects of rising temperatures and solar radiation during the day
Below Treeline Fair Be aware of rising temperatures during the day and the effects of solar radiation
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
High temperatures continue. Be on the lookout for glide avalanches. As you move down the valley route at the end of the tour, keep an eye out for steep terrains on either side. Pass quickly under slopes with glide cracks and do not stay there. Also, as the snow is melting, please consider the possibility that routes that were usable during the usual season may not be available. High temperatures are forecast for today as well as yesterday. Be careful of avalanches caused by wet snow. This type of avalanche is very heavy and even small ones can easily scoop you off your feet. Be sure to keep your attention above yourself. This will be a day of strong sunshine. Don't forget sunscreen and plenty of water. Have a good day.
Avalanche Problem
全層雪崩 Glide slab
Try to stay away from slopes with glide cracks.
点発生湿雪雪崩 Wet Loose snow
On very steep and large slopes, snow may collect and increase in size.
ウインドスラブ Wind slab
In High Alpine, the temperature is slightly negative. Also, storms (westerly winds) are currently averaging over 20 m/s. Watch for unstable slabs remaining in terrain pockets.
概要
Avalanche
Several size 2 glide avalanches were observed yesterday (29th). In addition, a size 2.5 slab avalanche was observed at an elevation of 2,000 m on the adjacent Hakuba mountain range. This avalanche occurred when crusts buried in the upper layers of the snowpack formed a water surface to stop the rain that permeated the snowpack.
Snowpack
Snowpack is entering its spring cycle. Rainfall and high temperatures are also contributing to the snowmelt. Glide crack movement has been observed to be active, due in part to continued high temperatures. A vigilance for glide avalanches is warranted.
Weather
Today, high pressure will be moderately covering the area, but yellow dust is expected. The Japan Meteorological Agency is forecasting winds from the west, slightly strong, then from the south, clear skies, and daytime high temperatures of 18 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is 6 °C (as of 4:45 a.m.), with no new rainfall in the past 12 hours.
