Current avalanche advisory for: Nelson Lakes
Issued at 7/10/2012 5:02pm. Valid till 9/10/2012 6pm
High Alpine
Above 2000 meters
Alpine
1000 to 2000 meters
Sub Alpine
Below 1000 meters
Primary Avalanche Danger
Dangerous Aspects
Likelihood
Certain
Size
Largest
Likley
Unlikley
2
Trend
Time of day
Increasing
No change
Small
Decreasing
All day
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Highest Danger Rating
Description:
Wind slab lee to the westerly quarters has
developed during Saturday due 15 to 20 cm of
new snow snow down to 1000m. Little
settlement of this will have occurred during
Sunday on shady aspects due to cool air
temperatures, Further snow is forecasted for
Monday associated with strong NW winds Any
activity is expected to be small and isolated to
below ridge crest and cornice development
above 1600m.
Secondary Avalanche Danger
Dangerous Aspects
Likelihood
Certain
Size
Largest
Likley
Unlikley
1
Highest Danger Rating
Trend
Time of day
Small loose wet snow avalanches are possible
below 1500m on all aspects on Monday due to
forecasted rain. Caution may be required at low
elevations later in the afternoon.
Increasing
No change
Small
Decreasing
Description:
1pm - 5pm
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Current Snowpack Conditions
The snow cover is between 100 to 200cm. Westerly aspects have the least snow cover. The last significant storm produced 85 cm of new snow
down to low elevation associated with very strong westerly quarter winds. Rain has since occurred to high elevations and the majority of the snow
snow pack is now wet grains(or a spring snow pack) that refreezes at night. Night time freezes have been marginal. Significant glide cracks are
developing down to ground at lower elevations on eastern aspects. The upper snow pack has now been refrozen and 15 cm of new snow has
fallen.
Recent Avalanche Activity
No observations possible
Mountain Weather
Issued at: 12:59pm Sunday 7 Oct 2012
Rain, with some heavy falls. Snow above 1200 metres.
Wind at 1000 metres: Northerlies, gusting 80 km/h in exposed places, easing in the afternoon.
Wind at 2000 metres: Northwest, rising to severe gale 80 km/h early morning, then gradually easing to 50 km/h in the afternoon and evening.
Free air freezing Level: Rising to 1900 metres.
For more information go to: http://www.metservice.com/mountain/index
Forecast by Matt Wilkinson