New Zealand Mountan Safety Council

Mackenzie

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Issued at 22/07/2017 3:08pm. Valid till 23/07/2017 6pm

Ohau

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:
The last storm cycle will have promoted the development of wind slab lee to the SE above 1400m. This concern can well continue to build even after the snow from the storm has ceased as the SE winds transport snow. Areas to be especially cautious of are just under ridge crest and behind sheltering terrain features mid slope or rollovers where the snowpack can be under tension.

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
10am - 4pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
With the sun about to make a brief appearance, there will be the possibility of loose wet sluffs out of steep solar affected terrain and around rocky bluffs and the like.

Recent Avalanche Activity

Recent Avalanche Activity
A couple of small isolated pockets off Mt Sutton released on Saturday with the gentle assistance of some explosives, nothing else reported.

Current Snowpack Conditions

Current Snowpack Conditions
A mostly shallow stable snowpack can be found around the ski area backcountry. On cold shady slopes, a layer of weak faceted snow can be found beneath storm snow from the start of the month. How this layer reacts to extra snow loading is the big question of the day.
Surface faceting (weak "hoar frost crystals) also existed on shady aspects on the surface earlier in the preceding with up to 35cm in this last storm, much of which has been relocated to Western slopes by the strong SE winds

Mountain Weather

Mountain Weather
A clear Sunday is predicted with NW winds picking up late in the day before the next frontal system on Monday


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

Forecast by Dave McKinley

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