Archived

Avalanche Forecast

Apr 12th, 2013–Apr 13th, 2013

Alpine

2: Moderate

Treeline

1: Low

Below Treeline

1: Low

Alpine

2: Moderate

Treeline

1: Low

Below Treeline

1: Low

Alpine

2: Moderate

Treeline

1: Low

Below Treeline

1: Low

Regions: South Rockies.

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 forecaster@avalanche.ca

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

Saturday: Light to locally moderate precipitation possible through the overnight period Friday to Saturday with the passage of a cold front. Freezing level 1300m. Winds strong from the southwest switching to moderate west.Sunday and Monday: A broad upper trough of low pressure brings unsettled conditions. Mainly cloudy with the chance for light to locally moderate convective precipitation. Freezing level to remain at 1300m.

Avalanche Summary

Loose wet or moist snow is expected to continue to release naturally from steep terrain or rocky areas at lower elevations if temperatures rise and the sun comes out.

Snowpack Summary

Overnight freezing has consolidated previously loose wet snow at treeline and above. Recent moderate winds may have developed windslabs at upper elevations. Surface crusts are expected to break down during the day and then re-freeze overnight. Moist or wet snow below treeline is not expected to have much of a recovery and may continue to be isothermal and weak.

Avalanche Problems

Wind Slabs

Recent snow and gusty winds may have formed windslabs in lee features in the alpine

Be cautious as you transition into wind affected terrain.>Be alert to conditions that change with elevation.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Loose Wet

Loose moist or wet snow may continue to release naturally from steep terrain or rocky cliffs. Moist or wet snow in motion may scour down to the ground where the snowpack is isothermal.

Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 4