ニセコ・羊蹄・余市・尻別 Niseko Yotei Yoichi Shiribeshi

211204 07:00

雪崩危険度と傾向

標高帯 信頼度 コメント
アルパイン Alpine Fair
森林限界 Treeline Good
森林帯 Below Treeline Good

留意すべき雪崩 Avalanche Problem

ウインドスラブ Wind slab

Expect complex loading patterns from the strong Southerly flow on Friday which has now shifted to the NW, A Southerly flow will resume by Sunday afternoon.

留意すべき雪崩 Avalanche Problem

ストームスラブ Storm slab

10-20cms of new snow arrived on Friday night with more expected to fall through the day on Saturday. Be wary of storm slab formation particularly as temperatures rise on Sunday.

留意すべき雪崩 Avalanche Problem

湿雪点発生雪崩 Wet Loose snow

Warm, sunny weather on Monday will increase the possibility of loose wet avalanches on solar aspects at the end of the forecasted period.

概要

雪崩 Avalanche

Loose wet avalanches up to size 2 were observed in the Niseko region following the Dec. 1st rain event

積雪 Snowpack

2 rain events over the past week have caused significant settlement of the snowpack. Friday night brought 10-20cms of new snow to some parts of the zone and the bond of this new snow should be monitored. Lower elevations do not currently have enough snow for avalanches to occur.

天候 Weather

Saturday will be cool with snowfall expected to increase in the late afternoon before tapering off on Sunday morning leading to an overcast day. Skies will begin clearing Sunday afternoon leading to warm, sunny conditions on Monday. Wind will be light to moderate throughout the forecast period but shift from the NW on Saturday to a Southerly flow by Sunday afternoon.

行動への助言

Snowfall amounts vary greatly across the zone and elevations bands. Use extra caution of new snow exceeds 30cms. Early season hazards exist at all elevations so travel with caution. The Niseko, Yoichi, Yotei, Shiribetsu avalanche bulletin will be available 3 times a week for the 2021-22 winter. Updates will be published at 7am on Tuesday, Thursday and Saturday throughout the season