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Avalanche Forecast

Apr 3rd, 2018–Apr 4th, 2018
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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

Regions: South Coast.

Avalanche danger will be governed by how the new snow is sticking to the old surface below - take the time to assess this bond as you travel through the elevation bands. Give cornices a wide berth when traveling on or below ridges.

Confidence

Moderate - Intensity of incoming weather systems is uncertain on Thursday

Weather Forecast

Light precipitation amounts on Wednesday with heavier snow fall (or rain) on Thursday-Friday. Freezing levels will increase slowly & steadily.WEDNESDAY: Cloudy with isolated wet flurries (5cm possible) / Moderate south west wind / Alpine temperature -4 / Freezing level 900m rising to 1200m in the afternoon THURSDAY: Wet snow (10-20cm) or rain at lower elevations / Light to moderate south-west wind / Alpine temperature -2 / Freezing level 1700mFRIDAY: Cloudy with wet flurries or rain at lower elevations (5-10 cm possible in the morning) / Moderate south west wind / Alpine temperature -1 / Freezing level 2000m.

Avalanche Summary

A few wet loose natural avalanches to size 1 were reported on sunny aspects over the long weekend.On Friday a size 1.5 slab avalanche was reported on the south face of the First (aka Pump) Peak on Mt Seymour, which is a heavily traveled slope. See here for a great photo.

Snowpack Summary

At tree line and below, we're into a spring cycle with a good re-freeze overnight (supportive crust) followed by daytime warmings to +3 and wet surface snow. New snow amounts over the past several days (10 cm or less) have been absorbed into the spring snowpack cycle. Alpine areas around Squamish likely received about 60-100 cm of storm snow a week ago, with wind early last week. In these areas the more recent snow is possibly sitting on a mixture of weak grains including a crust on solar aspects and potentially facets/surface hoar on polar aspects. Below the storm snow the snowpack is generally well settled and strong.

Avalanche Problems

Storm Slabs

The new snow will be falling on a wide variety of older surfaces. Check to see how the new now is bonding to the old snow below.
Be cautious as you transition into wind affected terrain.Extra caution needed around cornices with current conditions.Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2