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Avalanche Forecast

Archived

Mar 23rd, 2023–Mar 24th, 2023

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

North Island, West Island.

An incoming storm has the potential to deliver up to 30 cm of new storm snow that will fall on a well established melt freeze crust.

Allow time for this new snow to bond to old surfaces and carefully consider your terrain choices prior to committing to avalanche terrain, especially those areas with evidence of wind transport and loading.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported or observed in this zone over the past 48 hrs.

Backcountry users will likely see evidence of a small wet loose avalanche cycle from recent rain and solar input below treeline.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

In terrain above 1600 m up to 10 cm of preserved and wind affected dry snow is likely to exist. An established melt freeze crust can be found at elevations 1600 m and below, expect the new forecast snowfall to take a little time to bond to this old surface. At all elevations the mid and lower snowpack has a number of old melt freeze crusts that are unreactive and overall presents as consolidated, well settled and strong.

Weather Summary

Thursday Night

Mainly cloudy with snowfall, 15 to 25 cm of accumulation. Moderate southerly winds at ridgetop. Treeline temperature -3°C. Freezing levels 800 m.

Friday

Cloudy with flurries, 10 to 15 cm of accumulation. Moderate north winds at ridge top. Treeline temperature -3°C. Freezing levels rise to 800 m.

Saturday

Cloudy with flurries, 1 to 5 cm of accumulation. Moderate north winds at ridge top. Treeline temperature -3°C. Freezing levels rise to 800 m.

Sunday

Cloudy with no new precipitation. Moderate southeast winds at ridge top. Treeline temperature -1°C. Freezing levels rise to 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Watch for changing conditions today, storm slabs may become increasingly reactive.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.