雪崩ハザード評価の登録
Observer Richard Smith
Posted At：2019/04/04 17:25
RangeMyoko/Togakushi Mountain大毛無山 Locationアライスキー場
Observation At：2019/04/04
Elevation330m〜150m
Co-workerDave Iles
観察データ
気象データ
Temp. 1.2(0700hrs / 950m) 〜 5.6(1515hrs / 950m)
天気
午前FEW 雲量1-3
午後FEW 雲量1-3
降水種類
午前Nil なし
午後Nil なし
降水強度
午前
午後
HST
HS Range
風速
午前L 1-7m/s
午後L 1-7m/s
風向
午前S
午後S
飛雪
気象コメント Periods of OVC
雪崩データ
Avalanche Observations Sz 2 Na Glide Slab 150cm 20m 40m NE @ 550m Sz 2 Na LW 250m long S @ 850m in unskiable steep backcountry terrain
Avalanche Activities_Yes or No Yes
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 Moderate sized hard cornice on E aspects stubborn to ski cutting in morning. Wind slab on same aspects unreactive and isolated to within 5m of ridgeline. Large cornice formation observed in backcountry on N & E aspects. Previous new snow became moist during day due to solar and warm temperatures. Surface 20cm wet on solar aspects at all elevations. Ski penetration up to 50cm, but only able to push out snowballs when ski cutting, not entraining.
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