New Zealand Mountan Safety Council

Mackenzie

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Issued at 24/08/2016 5:36pm. Valid till 25/08/2016 6pm

Two Thumbs

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:
Small wind slab avalanches may be triggered on steep slopes on E to S aspects above 1900m. The danger is low but it's still worth checking how well the drifted snow is sticking if you're into very steep terrain.

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:
There aren't many places where you could trigger this one but there have been several avalanches this month at mt cook or at the northern end of the two thumbs forecast area on steep SE facing glaciated slopes at 2200 to 2300 m elevation that could be attributed to the buried facet layer mentioned below.

Recent Avalanche Activity

Recent Avalanche Activity
approximately 11 days ago a large avalanche was reported in the Upper Tindall stream . It ran on very steep glaciated terrain, SE aspect 2300m. This avalanche may have initiated on the buried facet layer mentioned below.

Current Snowpack Conditions

Current Snowpack Conditions
A few cms of wet snow fell on Sunday night with N-W gale wind. Melt-freeze crusts are forming on solar aspects and the pack is mostly stable. A deeply buried weak facet layer persists on some SE aspects above 1900m. This is well bridged by strong crust and slab layers above and is unlikely to react to human traffic anywhere outside of the most extreme terrain.

Mountain Weather

Mountain Weather
Overcast cloudy weather today. Some snowfall forecast for later in the week.


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

Sliding Danger

Slide For Life
Spring snow, watch out for hard frozen surface conditions especially in the morning before things warm up

Forecast by Trevor Streat

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