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Issued at 31/07/2014 7:16pm. Valid till 1/08/2014 6pm

Arthur's Pass

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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
CONSIDERABLE DANGER for wind slab avalanches in the lee of the NW storm. Winds up to gale force at the ridges have deposited new snowfall on the SE half. Squirling winds mean you can expect loading down and mid slope, around crossloadable features as well as along ridges. Windslabs are expected to be very reactive. Wind loaded areas should be avoided as the load of a single skier or climber could trigger avalanches. The runout zones should be avoided as we are seeing a natural avalanche cycle.

Secondary 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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
Around 40cm of fresh snow are expected to have fallen in the high alpine regions. As the snowfall has been happening in intervalls you can expect density changes in the upper snowpack and as a result a weakness within the stormsnow.

Tertiary 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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
There is CONSIDERABLE DANGER for wet loose avalanches in the Arthur's Pass region as precip continues. The freezing level is sit's above 2000m nowand precip is continuing. Slopes where previous dry faceted snow rests on crusts should be treated suspicious as old crusts still excisting in the snowpack act as a good sliding layer. Be able to identify avalanche runouts when travelling in alpine terrain as natural avalanches are likely to happen.

Recent Avalanche Activity

Recent Avalanche Activity
A natural avalanche cycle is happening in the forecast area.
Multiple avalanches have been observed around Mt Temple and Mt Phipps.

If you make any observations please report them by following the link on the website.

Current Snowpack Conditions

Current Snowpack Conditions
Snow fell down to 1000m at times last night. Up to 40cm of snowfall can be expected to have fallen in the alpine in high alpine regions around the divide. The fresh snowfall accompanied by the strong NW winds will have resulted in slab formations. The new snow will sit on a sugary facet layer sandwiched between crusts in the high alpine regions. In the lower regions the rain and the NW winds haven driven moisture in the snowpack which broke down previous excisting facet crust sandwiches. With further precip and wind and warm temps in the forecast the stability will decrease further.

Mountain Weather

Mountain Weather
Challenging rough conditions in the mountains as this NW systems is passing. Strong to gale force winds in the mountains and precip are continuing. Snow fell down to about 1000m last night but it has warmed up since and the freezing level has been rising to above 2000m and will remain there today.
Generally not the weather conditions to be travelling in the mountains.


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

Sliding Danger

Slide For Life
Alpine regions can be slippery. Travel with caution and use ixe axe and crampons.

Forecast by Markus Woertler

Mountain Safety Council
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