Avalanche Forecast

Issued: Apr 10th, 2016 3:00PM

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold. Known problems include Loose Wet and Cornices.

Avalanche Canada istorm, Avalanche Canada

Spring conditions typically means hazards are greatest during the heat of the afternoon. Start early and finish early.

Summary

Weather Forecast

Expect skies to cloud over on Monday as a weak disturbance arrives overnight Monday. It's a "cold front" so temperatures will cool and freezing level to lower -- looks like freezing level should hover between 100m and 1500m through Wednesday. It's a weak disturbance so only a few millimeters of precipitation is expected unless some localized convective cell happens to form over your valley in which case there might be 10cm of snow at high elevations. A mix of sun & clouds is the general pattern.

Avalanche Summary

With the arrival of spring, field observations and data are very limited in the region. No new avalanche reports does not mean avalanches are not occurring. One should expect cornices to continue to fail, at times triggering avalanches on the slopes below. Similarly, one must expect solar radiation and warm temperatures to weaken the snowpack, triggering loose wet and possibly wet slab avalanches.

Snowpack Summary

Moist or wet snow exists on all aspects at all elevations. Any surface crusts that form overnight will quickly break down during the day. The snowpack's strength is directly related to the thickness and strength of these crusts. Where there are layers in the snowpack, they are generally bonding. A widespread crust/facet layer from early February and depth hoar at the bottom of the snowpack (primarily in northerly & inland areas) are dormant. Strong, thick crusts in the upper parts of the snowpack have limited the reactivity of these old layers; however, they could potentially once again produce isolated yet large avalanches with prolonged periods of warming.

Problems

Loose Wet

An icon showing Loose Wet
Loose wet sluffing is possible on sun exposed slopes with sunshine or warm afternoon temperatures. The intensity of the sun and warmth directly effects he size and length; wet slabs are also possible, especially at lower elevations.
Avoid steep sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet. >Be cautious of wet sluffing in steep terrain. >

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Unlikely - Possible

Expected Size

1 - 3

Cornices

An icon showing Cornices
The timing of failures is unpredictable. Unsupported sections are extra suspicious. Dropping chunks are a hazard in themselves and they may also trigger a slab avalanche on the slopes below. Watch and limit your exposure to overhead hazards.
Give cornices a wide berth when traveling on or below ridges. >Cornices become weak with daytime heating, so travel early on exposed slopes. >

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

Elevations: Alpine.

Likelihood

Unlikely - Possible

Expected Size

2 - 5

Valid until: Apr 11th, 2016 2:00PM

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