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Issued at 30/07/2015 8:05pm. Valid till 31/07/2015 6pm

Tongariro

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 danger will remain considerable for windslab avalanches. While natural avalanche activity seems to have eased off, avalanche control teams have still been able to trigger these slabs by ski cutting on a variety of aspects. In Northern parts this problem seems to be more prevalent on North Eastern slopes, whereas in Southern parts the North West slopes seem to be more of a concern. There is quite a bit of variability with the sensitivity of this windslab at the moment. In some paths the use of explosives only left black holes in the snow, while on similar slopes the weight of a single person was enough to trigger an avalanche. With this variability in mind, make sure that you remain vigilant and don't get suckered in by seeing a few stable results out of your snow pits and slope tests. Human triggering will be a very real possibility.

Recent Avalanche Activity

Recent Avalanche Activity
Ski cutting and explosive use for avalanche control work produced more results up to size 2 over Thursday. These were lee to the Southerly half above 1700m. There was also a small accidentally triggered avalanche by a climber. This was not big enough to injure the person, but shows that things are still sensitive.

Current Snowpack Conditions

Current Snowpack Conditions
Windslabs around the region can be found on slopes lee to the Southerly half. These are anywhere between 20-60cm deep and are still only moderately bonded to the previous surface. In some areas there is a thin softer layer of snow within the slab which is the failure layer, and in other areas the slab appears quite consistent all the way through, but is still reactive to human triggering. The strength of the wind has stiffened up the slab significantly over the last 24 hours in more wind exposed areas.

Mountain Weather

Mountain Weather
The odd cloudy period with light to Moderate Westerlies


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

Sliding Danger

Slide For Life
There will be icy conditions on windward slopes and ridges.

Forecast by Ryan Leong

Mountain Safety Council
Avalanche Forecast Regions:
Mountain Safety Council managed websites
Mountainf Safety Council websiteAdventure Smart websiteNew Zealand Avalanche CenterNational Incedent Database website