Archived

Avalanche Forecast

Apr 13th, 2013–Apr 14th, 2013

Alpine

2: Moderate

The avalanche danger rating in the alpine will be moderate

Treeline

2: Moderate

The avalanche danger rating at treeline will be moderate

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: Kootenay Boundary.

Due to a lack of information sources at this time of year, this forecast is based primarily on weather data. If you have been traveling in the backcountry recently, send us your observations. Email us at [email protected]

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

Sunday and Monday: An upper trough of low pressure brings unsettled weather. Isolated showers and broken skies are expected. Winds light to moderate from the northwest and freezing levels 500-1000m.Tuesday: An Upper ridge of high pressure builds bringing generally dry conditions. Freezing level 1200-1500m.

Avalanche Summary

Recent reports indicate explosives triggered avalanches running to size 2.5 in the most recent snow on southerly aspects at treeline and above. Pockets of wind slab may be triggered by skiers or riders at higher elevations.

Snowpack Summary

Up to 25cm of new snow has fallen in the past 24 hours above 1400m. Recent moderate to strong winds may have created wind slabs in alpine leeward slopes. Cooler temperatures may have may have frozen the wet and isothermic snow surface into a crust at lower elevations. Expect these crusts to break down quickly as temperatures rise during the day.

Avalanche Problems

Wind Slabs

New wind slabs have developed in the alpine and at treeline.

Be cautious as you transition into wind affected terrain.>Make observations and assess conditions continually as you travel.>Be alert to conditions that change with elevation.>

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3