雪崩ハザード評価の登録
Observer Richard Smith
Posted At：2025/01/26 20:55
RangeNiseko Yotei Yoichi Shiribetsu MountainMt. Yotei LocationKyogoku Course
Observation At：2025/01/26
Elevation420m〜1898m
Co-worker
観察データ
気象データ
Temp. -1.0(0700hrs / 420m) 〜 1.0(1215hrs / 420m)
天気
午前FEW 雲量1-3
午後CLR 雲量0
降水種類
午前Nil なし
午後Nil なし
降水強度
午前
午後
HST0
HS Range250 @ 1230m
風速
午前L 1-7m/s
午後M 8-11m/s
風向
午前N
午後N
飛雪
気象コメント -9 at summit at 1100
雪崩データ
Avalanche Observations Sa wind slabs in cross loaded gullies at 1840m and 1470m, likely from past 24 hours. Up to 40cm deep, but only 5m across and not running far, not even size 1. Roller balling on steep solar aspects below 750m in PM.
Avalanche Activities_Yes or No No
シューティングクラック No
積雪データ
重要な層と弱層とテスト結果
Snowpack Wind effected surface layer from 0 - 20cm above 900m sitting on a settled firm base of RG. 5cm wind effected layer sits on soft snow (suspect FC) on polar aspects below 900m. Breaking easily and running on lower layer, but no propagation observed. MFcr on solar aspects, 5cm 1f+ at 950m and not seen above. Small SH between 1300m and 1600m on NE aspect.
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