New Zealand Mountan Safety Council

Canterbury

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Issued at 23/07/2017 1:24pm. Valid till 25/07/2017 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
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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 from wind slab avalanches. Human triggered wind slab avalanches are likely. Avoid steep slopes and the runouts of any avalanche terrain. Stay well away from cornices where they have formed.

Recent Avalanche Activity

Recent Avalanche Activity
A skier triggered a large cornice accidentally on Saturday. This avalanche propagated very far back from the lip and nearly carried the skier with it.

Current Snowpack Conditions

Current Snowpack Conditions
Approximately 20-30cm of new snow fell at middle and upper elevations over the previous 48 hours. Swirling moderate to strong winds have redistributed the new snow and deposited it mostly onto N aspects. At upper elevations along ridgelines large new cornices and wind slabs have formed. These have proven to be reactive to just the weight of a single person. In some isolated areas at middle and upper elevations there may be a persistent slab problem lurking.

Mountain Weather

Mountain Weather
Expect a mostly fine day today with light to moderate NW winds and partly cloudy skies.A stong NW system will begin to affect the Arthurs Pass area on Monday and forecasts are calling for 30-60cm of new snow. Stay tuned!


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

Forecast by Brad Carpenter

Avalanche Forecast Regions:
Mountain Safety Council managed websites
Mountainf Safety Council websiteAdventure Smart websiteNew Zealand Avalanche Center