New Zealand Mountan Safety Council

Canterbury

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Issued at 21/08/2017 10:53am. Valid till 24/08/2017 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
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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
11am - 4pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
There is a MODERATE danger from loose wet avalanches. The peak danger time will be midday on N facing slopes.

Recent Avalanche Activity

Recent Avalanche Activity
No new avalanches have been reported recently.

Current Snowpack Conditions

Current Snowpack Conditions
Mostly fine weather will dominate through Wednesday. As sunshine and warming temperatures affect solar facing (N) slopes we could see increased loose wet avalanche activity during the day followed by cold hard freezes at night.

The older weak snow that plagued our snowpack early in the season has seen a lot of new load over previous weeks. Several recent large slab avalanches may have failed on this layer at upper elevations. Warming temperatures and heavy rain have helped to break down weak layers and lock up the upper snowpack. Observations are limited but the weak layer may still exist in some isolated upper elevation areas. This could prove to be a failure plane in the future if we were to receive intense rainfall, lots of new snow or intense warming.


Mountain Weather

Mountain Weather
Fine conditions will develop on Tuesday and carry on into Wednesday. Expect light S winds that will change to light NW winds. the freezing level will increase to abve 2000m by wednesday. There is no suignificant chance for precipitation.


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

Sliding Danger

Slide For Life
Freeze thaw conditions will leave the surface of the snowpack very icy in the mornings and evenings. Carry an ice axe and crampons in your travels.

Forecast by Brad Carpenter

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