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Issued at 20/09/2014 6:32pm. Valid till 21/09/2014 6pm

Arthur's Pass

Mountain
Current avalanche advisory
High Alpine

Above 2000 meters

Alpine

1000 to 2000 meters

Sub Alpine

Below 1000 meters

Avalanche Danger Scale
Avalanche Danger Scale
Report TutorialPrint Reporthear report

Primary Avalanche Danger

Dangerous Aspects
high
Danger Rose
3
Highest Danger Rating
Likelihood
indicator
gauge
Certain
Likely
Unlikely
Size
indicator
gauge
Largest
Small
Trend
indicator
gauge
Increasing
No change
Decreasing
Time of day
clock
Time of day
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
There is a considerable danger for windslab avalanches in the easterly half. About 30cm of new snow fell at 1400m on friday. This snowfall has been accompanied by strong to gale force winds along the ridges which has transported significant amounts of snow onto the lee slopes. This storm came in several waves so we can find some midstorm weaknesses in the snowpack. Avoid any windloaded areas as the load of a single skier can trigger an avalanche and the runout zones of these ares as avalanches have the potential to travel far.

Secondary Avalanche Danger

Dangerous Aspects
high
Danger Rose
2
Highest Danger Rating
Likelihood
indicator
gauge
Certain
Likely
Unlikely
Size
indicator
gauge
Largest
Small
Trend
indicator
gauge
Increasing
No change
Decreasing
Time of day
clock
Time of day
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
With a significant amount of new snow on the ground there is a danger fro loose dry avalanches and sluffs.

Recent Avalanche Activity

Recent Avalanche Activity
Temple Basin skipatrol triggered slides up to size 2 yesterday mornming during control work.
Some small avalanches have been triggered by skipatrol with skicutting on friday..
Avalanches up to size 2 have been observed during the last stormcycle.

Current Snowpack Conditions

Current Snowpack Conditions
Up to 50 cm of snow have fallen on friday on a wet mostly stable snowpack which has been rained on last night. This snowfall follows tuesdays snowfall in which the high alpine regions have gained up to 60 cm of snow. Some midstorm weaknesses have been observed by the local skipartol (moderate results with resistant planars out of compression tests). Some windward spines and ridges have been stripped down to bare rock and slopes facing the leeside are heavily loaded. Some cornice formations have been observed and should be avoided.

Mountain Weather

Mountain Weather
A bit of snowfall in the forecast overnight clearing in the morning hours. Mostly fine day before the next front rolls in the evening bring another snowfall to the region. Light westerly winds turning southwest in the afternoon. Freezing Level about 1200m.


MetService
For more information go to: http://www.metservice.com/mountain/index

Forecast by Markus Woertler

Mountain Safety Council
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