Wind slabs exist on the north and west aspects. Wind-transported deposits are of decent size with high volume and mass on the north and west aspects. The wind slab problem is gaining strength and improving stability. The weather is settled over the next 24 hours with light to moderate winds and fine periods.
Wind slabs exist and are gaining strength and stabilizing. Triggering cannot be ruled out. Anchors were progressively buried by the last storm cycle, increasing the reactivity of these wind slab deposits. Weaknesses exist within the new snow and at the interface between new and old snow. It is advisable to avoid any slabs that have a convex shape and lack support.
Size 1 avalanche triggered by an explosive yesterday, the 10th of July. Turoa ski patrol during slope assessment. The location was 2100 metres on a northwest aspect.
Wind transported deposits on the north and west aspects now have a capping rime crust in the southwest areas of the region. Snowfall accumulation favoured the southwest areas, with northern areas being hammered by winds. Snowfall accumulation has also been noted on Mt Ngauruhoe and Mt Tongariro. The transported deposits are significant above 2000 metres in elevation. This new snow was transported to the north and west aspects, forming large deposits. A crust formed and is now buried within the new snow deposits. Weaknesses will be present within these deposits but continue to strengthen. The threshold has lowered over the previous 24 hours. The southwest areas of the region have isolated start zones above 1600 metres that have enough snow for avalanches to run.
Today is fine and clear. Tomorrow is fine as settle conditions continue. Winds are light southeasterly tending northerly tomorrow throughout the day (12th of July). The freezing level is about 1300 metres elevation, rising to 1400 metres over the next 24 hours. High pressure establishes itself across New Zealand today. The high slowly drifts eastward tomorrow, while a large trough approaches the country from the west.
Windward and exposed areas have been stripped by gale winds during the past storm cycle a few days ago. This has exposed any pre-existing icy rime crusts on slopes above 1400 metres. Plenty of hazards, such as exposed rocks and cliff bands, remain. It's essential to carry the appropriate gear, crampons, and an ice axe. A targeted skill set will reduce the chance of an accident.
Moderate
New Zealand Avalanche Advisory (NZ Mountain Safety Council)
