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Issued at 21/09/2014 3:18pm. Valid till 22/09/2014 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
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:
Heavy snow over Monday morning with increasingly strong South Westerly winds will see areas of windslab build up rapidly over the day. Rapid loading will mean that any weak layers that form may become quickly overloaded - natural avalanches will be possible. With a drop in the freezing level we will see snowfall and windloading down to all levels within the region, but currently around 1700m is where there is enough snow on the ground for avalanches to occur. If you are heading out into the backcountry keep a good eye on what slopes are loading (Slopes facing the North Easterly half will be the main ones to watch) and avoid them.

Recent Avalanche Activity

Recent Avalanche Activity
Explosive control work produced slab avalanches up to size 1.5 above 1800m on slopes facing the Easterly half. Most of these were quite shallow (around 10-15cm) but isolated results were up to 40cm deep and propagated widely.

Current Snowpack Conditions

Current Snowpack Conditions
On average about 10-15cm of new snow fell over Saturday night / Sunday morning. In the South this came with little wind and was evenly distributed. Northern parts had slightly more wind from the Westerly half which loaded leeward slopes with up to 40cm of new snow. The new snow has bonded relatively well to the old snow surface, with large loads needed to trigger avalanches over Sunday. With more snow and wind in the forecast for Monday you can expect another windslab avalanche danger to build.

Mountain Weather

Mountain Weather
The forecasts are calling for a heavy bout of snowfall for Monday morning with strong South Westerlies which will only get stronger over the day. With dropping temperatures we will most likely see snow to all levels within the region before the snowfall stops in the afternoon. All in all it doesn't look like the nicest conditions to be out and about.


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

Sliding Danger

Slide For Life
Expect it to be icy on windward slopes

Forecast by Ryan Leong

Mountain Safety Council
Avalanche Forecast Regions:
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