New Zealand Mountan Safety Council

Nelson Lakes

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Issued at 31/08/2016 8:34pm. Valid till 2/09/2016 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
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
11am - 3pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
The is a danger of loose wet snow avalanches on northern aspects on Tuesday due to clear sky's and a rising freeling level. Care will be required on steep solar aspects with a poor run out during the hottest part of the day.

Recent Avalanche Activity

Recent Avalanche Activity
None observed.

Current Snowpack Conditions

Current Snowpack Conditions
Cold and clear conditions in early July developed a significant weak layer within the old snow on southern and eastern aspects above 1800 metres. The layer responsible are large loose faceted crystals with resilient ice crust above and below. This issue has been slow to resolve. It is expected that without further load this layer will not create avalanches as it slowly gains strength but with significant snow fall could still be problematic.
The last westerly flow has redistributing snow available for transport at upper elevations.Small pockets of instability may have formed lee to the west at upper elevations this is likely to have settle well with the high freezing level. Snow transported to the south east may add load to the instability identified above which is not yet fully healed at upper elevations.

Mountain Weather

Mountain Weather
A little morning cloud then a clear day. Increasing high cloud during the late afternoon with the odd shower after dark.Freezing level at 2400m. North westerly winds increasing to gale in the evening.


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