New Zealand Mountan Safety Council

Nelson Lakes

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Issued at 21/09/2017 8:00pm. Valid till 24/09/2017 6pm

Nelson Lakes

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
10am - 3pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
Clear sky's will mean new snow may become saturated on solar aspects. Loose wet snow activity will be possible. Care will be required on solar aspects during the hottest prt

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:
Substantial amounts of snow have fallen during during the weekend and during this week. This may have formed wind slab above 1500m due to strong northwesterly and now north easterly winds. Care will still be required on very steep aspects lee to the prevailing winds at and about ridge crest.

Recent Avalanche Activity

Recent Avalanche Activity
No observations possible.

Current Snowpack Conditions

Current Snowpack Conditions
There are still weak layers in the old snow. Most concerning is a small weak layer below a thin ice crust at the top of the old snow pack. This weakness will produce consistent failure using a number of shear tests and may continue to be problematic. The warm temperatures and rain below 1900m may have cured this problem at lower elevations. Northwesterly winds and snow have continued to load south and eastern aspects but this snow will again be redistributed as the snow turns to the south east.


Mountain Weather

Mountain Weather
A few showers mainly in the east and fine else where. Freezing level at 1700m rising to 2200m. Winds from the south.


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

Forecast by Matt Wilkinson

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