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Issued at 20/08/2014 12:21pm. Valid till 22/08/2014 6pm

Ohau

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
Report TutorialPrint Reporthear report

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
All day
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
While the general stability is mostly good. There will still remain some isolated pockets of terrain where a stiffer overlying slab of wind transported snow lies over a weaker one. I'd be looking carefully at sheltered lee to the SW slopes above 1900. Closer to the divide this hazard would be greater.

Secondary 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
10am - 4pm
Alpine level
High Alpine: Above 2000m
Alpine: 1000 to 2000m
Low Alpine: Below 1000m
Description:
In the heat of the day there will be a possibility of small wet loose slides being triggered on steep sunny aspects. Probably where the best snow is. Manage your approach and riding to take in account how wet and sloppy it is getting and get off before it starts sluffing. As the overall temperatures will be quite cool, this hazard will mostly correlate with how much sun is on the slope.

Tertiary 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:
The extent and sensitivity to triggering of this layer in the Ohau back country is unknown but it does exist on similar terrain in the Gammacks and Ben Ohaus where we are still getting very isolated, but sudden, smooth shears beneath the weak layer 50 to 110 cms down in the snowpack. Have a dig around and see what you find. The immediate slack country off Ohau ski area is just on the elevation limit of the facet layer, so your unlikely to find it unless your venturing into higher elevation terrain to the north.

Recent Avalanche Activity

Recent Avalanche Activity
Late last week there were a couple of small slabs near ridgeline on NE & SE aspects, but nothing happening since.

Current Snowpack Conditions

Current Snowpack Conditions
Overall conditions are that of a well consolidated firm snowpack, softening in the heat of the day to spring conditions.
In the North of the forecast area and in areas above 1900m there are more layers to the snowpack including possibly some sugary, weak facet layers that still bear watching for.

Mountain Weather

Mountain Weather
A Blustery cold start to Thursday with the slight possibility of a few flakes of snow will ease into gradually improving weather later and on into the weekend, and on, and on.....


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

Sliding Danger

Slide For Life
If you did happen to be wandering or riding on wind hammered shady (SW) slopes, don't be surprised if you find very firm conditions and the potential to slide a long way if you have momentum on. Ski/ride in control at all times.

Forecast by Dave McKinley

Mountain Safety Council
Avalanche Forecast Regions:
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