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Avalanche Forecast

Archived

Mar 2nd, 2022–Mar 3rd, 2022

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

Regions

Yukon.

New snow is starting to bond to old, firm surfaces but this bond should continue to be investigated. As we see more sun over the next few days, the upper snowpack could become weakened.

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

  

Wednesday night: Mostly cloudy. Intermittent flurries. Wind light from the south. A high of -2°C and a low of -6°C. Freezing levels will remain at valley bottom

Thursday: A mix of sun and clouds. Flurries possible. Wind light from the south. A high of -4°C and a low of -8°C.

Friday: A mix of sun and clouds. No precipitation. Wind light from the south. A high of -4°C and a low of -10°C.

Saturday: A mix of sun and cloud. Flurries possible. Wind starting light and building to moderate from the southwest. A high of -4°C and a low of -10°C.

Avalanche Summary

No new avalanches were reported on Wednesday.

On Tuesday afternoon, our field team reported a widespread natural avalanche cycle to size 2 in the alpine areas beyond Fraser (Bryant) Lake

Snowpack Summary

15-30cm of storm snow from the weekend now sits on top of firm surfaces in White Pass. As of Tuesday afternoon, this storm snow had settled enough to produce a natural avalanche cycle up to size 2 as reported by our field team. The avalanches were running on firm, wind hammered surfaces. A thin crust can now be found on south facing slopes at lower elevations. 

The middle snowpack is firm, well settled, and bonded and is effectively bridging the weak, sugary crystals that exist at the bottom of the snowpack. 

Areas north of the White Pass such as Paddy Peak, Tutshi, and Powder Valley continue to host a wind smashed and scoured landscape. 

Terrain and Travel

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Don't be too cavalier with decision making, storm slabs may remain sensitive to human triggering.
  • Be alert to conditions that change with elevation and sun exposure.
  • Watch your sluff: it may run faster and further than you expect.
  • Use appropriate sluff management techniques.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.