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Issued at 3/08/2015 1:07pm. Valid till 4/08/2015 6pm

Aoraki/Mt Cook

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
4
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:
Windslab avalanching is certain on steep terrain lee to the NW today, especially at higher elevations about the Divide.. Some major paths could well run out to below the snowline so if you're out and about rambling or hunting it will pay to be aware of the terrain above and stay away from avalanche runout zones.

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:
Loose wet and wet slab avalanches could run today in rain soaked snow below 1900m. Stay away from areas beneath steep snowy terrain and gulleys that could channel debris down below the snowline.

Tertiary 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:
Weaknesses in the form of faceted snow crystals have previously been identified buried mid snow pack. These layers have been gaining strength but could become reactive with the extra load of new snow or rain thats being added to the snowpack. The danger overlaps with the existing windslab hazard, but could result in larger avalanches than the depth of new windslab would suggest.

Recent Avalanche Activity

Recent Avalanche Activity
Numerous loose snow and slab avalanches were observed from Mt Cook Village on August 1 following wind and snowfall. Poor visibility since then has hampered observations but it's likely that another avalanche cycle is taking place now.

Current Snowpack Conditions

Current Snowpack Conditions
Below 1900m the snowpack is wet with rain. At higher elevations about the divide significant amounts of recent snowfall have been redistributed by gale N to NW winds to create heavy deposits of windslab on lee slopes. The amount of new snow or rain diminishes with distance east of the divide but windslab will be accumulating on South and East aspects above about 1900m. The layer of weak faceted snow that exists in places on terrain out east of the divide or where the snow cover is shallow may come to life with the heavy additional loads that the current storm looks set to deliver.

Mountain Weather

Mountain Weather
Freezing levels sunday night rose to 2300m along with a little rain and much wind. Precipitation intensified during the morning and by monday lunchtime 56mm of rain had fallen in the village along with gale N winds at ridgeline and a freezing level of 2100m. Temperatures are forecast to continue to drop and we should see snowfall lowering to 500m over the next 36 hours.


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

Sliding Danger

Slide For Life
Sliding hazard is still an issue especially below about 1900m, crampons and ice axe should be in your kit.

Forecast by Trevor Streat

Mountain Safety Council
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