New Zealand Mountan Safety Council

Mackenzie

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Issued at 23/08/2017 5:34pm. Valid till 24/08/2017 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
1
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:
Skier triggered windslabs are possible lee to the northwest, especially near ridgeline. Look out for windloaded slopes and avoid typical start zones like steep chutes and convex rolls. There's limited snow available for transport on northwesterly slopes at the moment, and any windslab avalanches around Ohau ski area are likely to be small. More snow and more wind will make for larger avalanches higher elevations and closer to the divide. Even a small avalanche can have nasty consequences if it carries you over bluffs or into a terrain trap.

Secondary Avalanche Danger

Dangerous Aspects
high
Danger Rose
1
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:
Small loose wet slides could run out of very steep terrain catching strong sunshine.

Recent Avalanche Activity

Recent Avalanche Activity
No reports of recent avalanching.

Current Snowpack Conditions

Current Snowpack Conditions
Last weeks warm and wet storm left a moist snowpack up to about 2000m. Cooling since has tightened and refrozen the pack. Some snow fell to about 1400m early on Friday that was redistributed by NW gales leaving stiff windpack in many areas. Over the weekend a weak SE flow covered the region and delivered up to 20cm in the Ben Ohau range to 1200m, but only 5 or so cm's around the Ohau ski area.

Strong winds in the next 24 hours will strip soft snow from exposed areas and create windslabs lee to the northwest.

Mountain Weather

Mountain Weather
Northwesterly winds are forecast to increase through Thursday and Friday before a storm hits on the weekend.


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

Sliding Danger

Slide For Life
Some exposed slopes, ridges, and humps may well be slick and firm.

Forecast by John Horan

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