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Avalanche Forecast

Apr 17th, 2018–Apr 18th, 2018
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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Northwest Coastal.

The weather is due to change with snowfall forecast to start Wednesday and carry through to Friday. Avalanche danger will gradually increase as the snow starts to accumulate at a higher rate on Thursday.

Confidence

Low - Due to the number of field observations

Weather Forecast

WEDNESDAY: Flurries, accumulation 5cm. Light to moderate south wind. Alpine temperature -2. Freezing level 1100 m. THURSDAY:  Snow, accumulation 15-25cm. Moderate to strong southwest wind. Alpine temperature -3. Freezing level 1000 m. FRIDAY: Periods of snow, accumulation 10-15cm. Moderate south wind. Alpine temperature -3. Freezing level 1000 m.

Avalanche Summary

There are no recent reports of avalanche activity. Reports from this weekend indicate loose wet activity on steep slopes facing the sun at tree line and in the alpine. These avalanches were reported as size 1-2 and were isolated to the recent surface snow only.

Snowpack Summary

Recent new snow and strong variable winds have formed wind slabs on a variety of aspects at treeline and above. In the south of the region, two layers of surface hoar are buried early-March and mid-March are approximately 70-100 cm deep. The layers are most prominent on north to east aspects and were buried In the north of the region, these layers are around 40 cm deep.Below these March layers the mid-pack is generally well-settled and strong. However in the far north of the region there are weak sugary facets near the bottom of the snowpack.

Avalanche Problems

Wind Slabs

Recently formed wind slabs may still be reactive to human triggers in the lee of terrain features.
Travel on ridgetops to avoid wind loaded slopes.Be cautious as you transition into wind affected terrain.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2