New Zealand Mountan Safety Council Avalanche Center
homeNew Zealand Avalanche ForecastsEducationResourcesDonateAbout usContact us

Nelson Lakes

Nelson Lakes YouTube Channel

link arrowYouTube Channel

Be kept in the loop:
Email Sign up
Facebook
Twitter
YouTube
Join
MetService Getting the goods on the weather forecast is never easy. Get your mountain weather forecast right now!
Link ArrowMet Service
Issued at 20/08/2014 8:18pm. Valid till 22/08/2014 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
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
11am - 3pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
The snow pack below 1800m remains loose and unsuportive on solar aspects. Avoid steep start zones where the snowpack has become loose ,uncohesive and the run out is poor. Fine spells forecast tomorrow will see this concern increase in the middle of the day untill the freezing level lowers in the afternoon.

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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
Wind slab may exist on slopes lee to the southwest. This will be most significant above 1800 metres. Caution required on steep start zones at ridge top where slab and cornice has developed.

Recent Avalanche Activity

Recent Avalanche Activity
Loose wet activity has been observered on steep north facing aspect at 1800 m.180814.

Current Snowpack Conditions

Current Snowpack Conditions
The first week of August saw up to 50cm of snow fall in the park. This has been asociated with winds from the northwest and southwest.
It is expected that most loading has occured lee to these aspects. Cornice developement is also expected to be widespread.
Early season snow was subjected to heavy rain events in early july to high elevations. This creacted two rain crusts, which have promoted facet growth thanks to cold and clear conditions. This combination of a persistant weakness(large facets) at the bottom of the snow pack, which received extensive loading from the westerly half is a concern.
Very steep slopes that are heavily loaded should be investigated before traveling on as there is a possibility of this facet layer causing failure in the old snow at upper elevations, especialy on non solar aspects.

Mountain Weather

Mountain Weather
Rain and snow to 1400 m today in the afternoon. Fine spells tomorrow. Southerlies rising to gale. FL lowering to 800m.









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

Forecast by Adrian Briggs

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