New Zealand Mountan Safety Council

Mackenzie

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Issued at 29/07/2016 11:22am. Valid till 30/07/2016 6pm

Two Thumbs

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
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:
Human triggering avalanching in wind drifted snow is possible on and about slopes facing NE through SE. Watch for signs of recent avalanching and remain observant of local wind loading patterns which could result in slab build up on other aspects. Continuing unsettled weather through the week will keep the chance of windslab avalanching alive , especially during or just after a fresh snowfall.

Recent Avalanche Activity

Recent Avalanche Activity
No Recent observations, windslab avalanching at size 1 to 2 is likely to have occurred in a few spots on S and E facing slopes in the N of the forecast area.

Current Snowpack Conditions

Current Snowpack Conditions
Snow cover in the area is slowly improving but strong westerly quarter winds continue to redistribute recent snowfalls. The snowpack seems to be mostly well settled with the main concern being fresh windslab deposits on S and E aspects about ridgeline. Deeper in the snowpack an old weak layer of sugary faceted snow lying above a rain crust seems to be gaining strength wherever it has been observed recently. This layer can be found buried on polar aspects above about 1900m. The chances of triggering an avlanche on it are probably limited to just a few very steep unsupported slopes that have not already avalanched.

Mountain Weather

Mountain Weather
Changeable weather with westerly winds, sometimes strong, and occasional light snowfalls looks set to continue.


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

Sliding Danger

Slide For Life
Firm crusts are likely about exposed windward slopes, perhaps disguised by a thin layer of loose snow. Take care.

Forecast by Trevor Streat

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