Archived

Avalanche Forecast

Jan 17th, 2017–Jan 18th, 2017

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

2: Moderate

The avalanche danger rating below treeline will be moderate

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

2: Moderate

The avalanche danger rating below treeline will be moderate

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: South Coast.

Warm wet weather continues. Where it rains, watch out for loose wet snow (or wet slabs in the alpine); where it snows, watch out for storm slabs.

Confidence

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

Weather Forecast

Warm wet weather continues. Ridge top temperatures have been fluctuating but most precipitation has been falling as rain at all elevations. WEDNESDAY: Still more rain (30-50mm). Winds moderate gusting strong southwesterly. Alpine temperatures to +4 ; freezing level dropping slightly to 1900m. THURSDAY: A mix of snow and rain (20mm water equivalent). Winds light gusting to moderate from the southwest. Freezing level 1300m and alpine temperatures to +2 Celsius. FRIDAY: Unsettled weather with occasional rain or snow (5mm water equivalent). Winds light - moderate from the east. Freezing level 1500m and alpine high temperatures to +4 Celsius.

Avalanche Summary

No new observed.

Snowpack Summary

The rains have begun to saturate the snowpack up to alpine elevations. This includes a widespread melt-freeze crust which formed over the weekend on most aspects and elevations at treeline and below. In the same elevation band, a thick crust can be found 5-10cm below the surface, which has kept the snowpack quite stable. Higher up in the alpine, old wind slabs from last week could remain reactive on steeper unsupported terrain, especially if loaded by new snow or saturated by rain. The mid and lower snowpack are well settled and stable.

Avalanche Problems

Loose Wet

If we see heavy rainfall, the snow will become loose and wet.

Use caution above cliffs where small avalanches may have severe consequences.Use extra caution on slopes if the snow is moist or wet.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Wet Slabs

Watch for rain saturating old wind slabs at the highest elevations in the alpine.

If triggered the loose wet sluffs may step down to deeper layers resulting in large avalanches.Use extra caution on slopes if the snow is moist or wet.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 3