New Zealand Mountan Safety Council

Canterbury

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Issued at 25/07/2016 6:08pm. Valid till 27/07/2016 6pm

Mt Hutt

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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
A moderate rating is now in place across the region in the upper elevation bands. After a weekend of severe gale winds and a period of snowfall pockets of freshly deposited wind pressed snow lie on lee slopes. Observations on Monday have highlighted a mid-storm sheer within the latest new snow fracturing on moderate loads. With such severe winds protected areas around 1800m have received the best coverage. Be wary of new loads over 30cm in steep terrain which may overload the previous surface and run long distances. Plenty of rock remains and any ride will prove painful.

Recent Avalanche Activity

Recent Avalanche Activity
Small surface cracking has been observed at the ski area during post storm control work. This cracking remained isolated within the latest new snow. Any pockets released were observed below 1800m and of low volume lee to the NW.

Current Snowpack Conditions

Current Snowpack Conditions
Up top 15cm of new snow has fallen over the weekend. This latest snow fall has touched down with severe gale NW winds. Early in the storm a period of rain fall began before temperatures dropped . Observations around 1800m appear to show the previous slick firm rain crust surface has been heated and become soft. Above this pockets of up to 20cm isolated wind slab have been deposited on lee slopes. Are main concern will be the bond between to new and old surface with further testing required during Monday.

Mountain Weather

Mountain Weather
Tuesday will remain fine with warm temperatures freezing levels will jump above ridgeline and winds will stay light. Wednesday will see the chance of further snow flurries as another frontal passage moves in. Metservice have all the details for the week in the link below.


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

Forecast by Ronan Maguire

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