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Issued at 31/07/2015 2:07pm. Valid till 1/08/2015 6pm

Tongariro

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
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:
Another day of settled weather on Friday has helped strengthen the areas of windslab and the danger has now decreased to Moderate. There is still a weakness within the windslab, but our testing in the field is showing that it is becoming more stubborn to triggering. Control work over Friday only produced isolated avalanches from using large explosives. As the next front moves onto the region we may see an increase in the danger from Saturday evening when new snow starts to fall and is transported by North Westerly winds. This will be more of an issue above 2000m due to the warmer temperatures. Make sure you check back in daily as we update the advisory over the storm.

Recent Avalanche Activity

Recent Avalanche Activity
Explosive use produced isolated results over Friday morning, and only on paths that had not been previously controlled over the last few days. The largest result was a size 2 windslab that was 1m deep. No new natural or skier triggered activity has been reported.

Current Snowpack Conditions

Current Snowpack Conditions
The areas of windslab from the last few days are gaining strength to the point where it now requires large loads to trigger them in general. There still may be isolated areas lingering where human triggering is still possible, but these are becoming few and far between. In Southern areas a cold temperature gradient has started to create a weak faceted layer near the surface, but it will need a few more days of cold clear weather (which doesn't look likely in the near future) to develop to the point where it is a concern.

Mountain Weather

Mountain Weather
As the high moves on to the East we should see some murky conditions in the North associated with the North West wind change. It may stay a little clearer in the South of the region, but it looks as though by the end of the day we should have some snow falling above 1800m.


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

Sliding Danger

Slide For Life
Icy conditions on windward slopes and ridges.

Forecast by Ryan Leong

Mountain Safety Council
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