New Zealand Mountan Safety Council

Mackenzie

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Issued at 30/07/2016 12:07pm. Valid till 31/07/2016 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
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:
Windslab avalanches may be triggered on steep S and E aspects as a result of westerly wind loading. Local wind effects could lead to some slab build up down wind of terrain features on other aspects. Conditions will be at their touchiest during or just after any fresh snowfall over the next few days. Remember to apply the usual safe travel techniques, ride one person at a time on steep slopes, and always carry a shovel, beacon, and probe on backcountry trips.

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:
The cornices en route to Dumbell lake are reportedly much larger than normal. Fight the urge to peek over the edge, give them a wide berth and live to ride another day.

Recent Avalanche Activity

Recent Avalanche Activity
Nothing reported as of Sunday midday. Multiple small storm or windslab avalanches at size 1 reported at the ski area following the previous snowfall a few days ago.

Current Snowpack Conditions

Current Snowpack Conditions
The latest frontal system is delivering snow throughout the region down to low elevations with 10 to 20cms possible above 1400m through Saturday. Ridgeline winds will be moderate to strong out of the W, which will be adding fresh windslab to slopes facing E and SE. Previous snowfalls have all been redistributed NW,W or SW gales. The snowpack seems to be mostly well settled with the main concern being fresh windslab deposits on S and E aspects about ridgeline. An old weak layer of sugary faceted snow lying above a rain crust could still be found buried mid-pack on polar aspects above 1900m. This layer is gaining strength. The chance of triggering an avalanche on it will be limited to just a few very steep unsupported slopes that have not already released.

Mountain Weather

Mountain Weather
Unsettled weather, westerly winds, and occasional snowfalls will keep the risk of windslab avalanching alive for the next few days.



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

Sliding Danger

Slide For Life
Exposed windward terrain could be slick and icy, avoid this kind of area or use axe and crampons for safe travel.

Forecast by Ben Taylor

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