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Avalanche Forecast

Apr 5th, 2019–Apr 6th, 2019
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Purcells.

New snow and wind will mean that storm slabs are likely to be encountered, and may be reactive to human triggering, especially in wind loaded areas.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

FRIDAY NIGHT - Flurries, 5-10 cm / southerly winds, 20-40 km/h / alpine low temperature near -5SATURDAY - Mainly cloudy with scattered flurries, up to 5 cm / southwest winds, 20-50 km/h / alpine high temperature near -3 / freezing level 1900 mSUNDAY - Cloudy with flurries, 5-10 cm / southwest winds, 15-35 km/h / alpine high temperature near -2 / freezing level 1900 mMONDAY -  Cloudy with sunny periods and isolated flurries / southwest winds, 15-30 km/h / alpine high temperature near -2 / freezing level 2000 m

Avalanche Summary

On Thursday, there were a few reports of natural and human triggered storm and wind slab avalanches in the alpine, as well as a few human triggered loose wet avalanches.On Tuesday, there were two reports of natural slab avalanches, size 2-2.5. The size 2 was a west aspect on a steep moraine feature at 2100 m. The size 2.5 was on a northeast aspect at 2300 m and was triggered by an ice fall on a glacier.

Snowpack Summary

10-20 cm of recent storm snow sits on a melt-freeze crust on all aspects except for north slopes above 2000 m, where it sits on dry snow and isolated wind slabs. Recent snowfall amounts taper quickly below treeline.The base of the snowpack is composed of sugary faceted snow. The likelihood of triggering an avalanche on this layer is lower during colder periods and elevated during intense warming.Snow is disappearing rapidly at lower elevations.

Avalanche Problems

Storm Slabs

Up to 20 cm of new snow has fallen in the region with strong winds. Storm slabs will likely be the most reactive in wind loaded areas.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5