New Zealand Mountan Safety Council

Southern Lakes

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Issued at 24/08/2016 6:24am. Valid till 25/08/2016 6pm

Wanaka

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:
A significant amount of snow fell along the Divide on Sunday and more arrived on Monday . Snowfall totals were lower further East. Gale force winds from the Northerly 1/4 lashed the region on Sunday and Monday. On Wednesday, strong to gale force NE winds are predicted. As a consequence, deposits of wind slab may be encountered especially, on slopes East through SW above about 1500m. Avoid ridge line entry points, start zones and other steep terrain if you discover stiff, wind driven snow.

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
10am - 3pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
Warm temperatures will heat the surface and this may lead to loose , wet avalanche activity especially on solar (North Facing) aspects during the middle of the day. Ideally, at this time of year you want to arrive at the top of the slope just as it is beginning to unlock but before it becomes too soft. This approach will provide the best , and safest skiing or riding. If the snow under your skis or board is becoming very soft or slushy, it is time to move to a cooler aspect.

Recent Avalanche Activity

Recent Avalanche Activity
Local heli ski operators have reported avalanche activity up to Size 2, on South and SE facing slopes between 1600 and 1800m. These appear to have been the result of wind transport lee to the N1/4. With new snow and warm weather we are likely to see an increase in wet slide activity on the solar aspects.

Current Snowpack Conditions

Current Snowpack Conditions
A substantial amount of new snow fell along the Divide, a couple of days ago. Much less fell further East. Warm temperatures will help with the bonding process but it does take time. In general, the mid pack appears to be rounding and increasing in strength. However, potential weaknesses including facet layers (loose,sugary snow) may still exist in some areas.The facet layers are most likely to be present on steep,shady slopes (S through E) above 2000m. The lower pack appears relatively strong at the moment, with a laminate of crusts bonding it together. Melt/freeze crusts have recently formed on solar (North facing) aspects and these will now be covered by fresh snow.

Mountain Weather

Mountain Weather
Rain/ snowfall is forecast to develop in the afternoon. NE winds will rise to gale force during the day. The NE flow is likely to produce periods of poor visibility.


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

Forecast by Simon Howells

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