New Zealand Mountan Safety Council

Nelson Lakes

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Issued at 23/07/2017 5:40pm. Valid till 26/07/2017 6pm

Nelson Lakes

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
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:
Due to continued moderate to strong winds initially from the northwest and now the southwest wind slab will continue to develop in upper start zones on eastern aspects. There is a reasonable amount of loose dry snow available to transport. This danger will be mainly at higher ridge crests above 1700m. Avoid steep east facing slopes near ridge crest at upper elevations and care require elsewhere. Be careful people.

Recent Avalanche Activity

Recent Avalanche Activity
Significant wind transport occurring and would expect the odd natural avalanche on steep loaded eastern aspects at upper elevations will have occurred. Still have little information from the southern end of the park.

Current Snowpack Conditions

Current Snowpack Conditions
Shallow snow for the early part of this season will most likely mean that the old snow on southern and eastern aspect will be weak.
Wind slabs will have developed above 1700m on south and eastern aspect. Surface hoar has been observed on shady aspects which may have been buried above 2000m.
Strong winds from the northwest for much of the night on Friday, southerly winds on Saturday and continued snow snow and strong southwesterly winds willhave made windslab a wider spread issue in particular by loading eastern aspects so please take care at upper elevations.

Mountain Weather

Mountain Weather
Increasingly heavy snow showers lowering to 1200m by evening. Moderate southwesterly winds continue. Freezing level at 1200m.




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

Forecast by Matt Wilkinson

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