New Zealand Mountan Safety Council

Tongariro

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Issued at 30/07/2016 12:56pm. Valid till 31/07/2016 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:
There has been substantial loading on Eastern aspects above 1600m over the last 72hrs, this loading will continue to develop over the next 24hrs as winds from the Northwest and snowfall increases. for this reason the danger rating is considerable above 1600m. We are in a very active weather cycle with high winds and increasing amounts of snowfall, during this period the rapid development of wind slab coupled with inclement weather will make route finding and avalanche assessment difficult. During the development of this slab there is a very good chance that a single skier could trigger an avalanche up to 1m deep. It is currently best to avoid heading into avalanche terrain, more pleasant alternatives should be sought.

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:
As the low pressure system continues to deposit new snow, storm slab will develop on northeast through to south aspects, this is expected to form in very sheltered terrain features with light to moderate winds, there is a strong possibility of triggering by a single skier. Poor visibility and continuing loading will make it very difficult to identify the hazard, therefore it is advisable to avoid heading into consequential avalanche terrain or better yet remain in the café.

Recent Avalanche Activity

Recent Avalanche Activity
Small size 1 Natural wind slab avalanches observed yesterday within the Tukino ski area.

Current Snowpack Conditions

Current Snowpack Conditions
Over the last 24hrs there has been continued loading (10-15cm) on eastern aspects on top of the existing storm/wind slab. The sum total of the slab (up to 1m) developed over the last 72hrs has bonded well with no significant weaknesses and has proved difficult to initiate a failure with explosives. A clearing this morning allowed for explosive work and avalanche assessment however the next storm front approached quickly and by mid morning start zones were loading quickly and snowfall amounts have begun to increase.

Mountain Weather

Mountain Weather
Showers becoming widespread with possible thunderstorms, winds increasing to severe gale North Westerly with snow down to 700m. Freezing level 1500m rising in the afternoon to 1900m


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

Sliding Danger

Slide For Life
A stiff rime crust exists on windward slopes creating a serrated ice surface which is not pleasant to ski or walk on. Carry ice axe and crampons to battle these conditions

Forecast by Dave Wright

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