New Zealand Mountan Safety Council

Southern Lakes

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Issued at 22/08/2017 7:33pm. Valid till 23/08/2017 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
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:
In general, the upper snow pack will be settling out as it is several days since the last significant snowfall. Isolated pockets of wind slab may still be found especially on slopes facing East through to South West above about 1400m. Avoid ridge line entry points, convex ground and other steep terrain if you encounter deposits of stiff, wind driven snow.

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:
A substantial amount of weight has landed on the pack since last Wednesday. This loading will test weaknesses deep in the pack such as facet layers (loose, sugary forms) sitting on hard crusts. While it is unlikely that you will trigger one of these deep slabs, if you are unlucky enough to hit the weak spot in a slope a large, destructive avalanche could result. Steep, shady (South facing) areas in particular, still need to be treated with respect. Ski or ride pitches one at a time, keep your eyes on your companions and park up in safe zones.

Tertiary 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
10am - 3pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
Loose, wet avalanche activity is possible especially on the solar (North facing) aspects during the middle of the day. Small point releases and pin wheeling are signs that the surface is warming rapidly.

Recent Avalanche Activity

Recent Avalanche Activity
No avalanches reported for several days. A number of large (Size 2 - 4) avalanches reported 170819 South/SE aspects, elevation band 1950m to 2100m. Most of these were initiated during explosive control work. One reported avalanche was a skier accidental. These avalanches are failing almost to ground and running on very hard crusts (mid June rain crust?)

Current Snowpack Conditions

Current Snowpack Conditions
A substantial amount of snow (150cm plus) has fallen along the Divide in the last week. Snowfall totals have been lower further East. This recent snow is in the process of bonding to the old surface helped, by relatively warm temperatures.. The mid and lower pack were reasonably well consolidated prior to the most recent Northerly storms. However, weaknesses, in the form of facet layers and hard crusts may still exist in places especially, on shady (South facing) slopes at higher elevations (above 2000m). A melt/freeze cycle has developed over the past couple of days on the solar (North facing) aspects.These sunny slopes have been softening mid morning to provide enjoyable Spring skiing and riding.

Mountain Weather

Mountain Weather
Wednesday is shaping up as a good day to be out in the back country. The weather should be mainly fine with perhaps some high cloud later. Light NW/Northerly wind are predicted.


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