Archived

Avalanche Forecast

Apr 19th, 2018–Apr 20th, 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

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

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

2: Moderate

The avalanche danger rating at treeline will be moderate

Below Treeline

2: Moderate

The avalanche danger rating below treeline will be moderate

Regions: Northwest Inland.

Forecast new snow and strong winds will form small wind slabs in leeward areas near ridge crests and on convex features reactive to human triggers.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

FRIDAY: Snow; accumulation 5-10 cm. Moderate to strong southwest wind. Alpine temperature -2. Freezing level 1200 m.SATURDAY: Cloudy with flurries; accumulation 3-5 cm. Moderate southwest wind. Alpine temperature -4. Freezing level 1000 m. SUNDAY: Mix of sun and cloud. Light to moderate southwest wind. Alpine temperature -1. Freezing level 1400 m.

Avalanche Summary

No new avalanches were reported in this region. Avalanche reports have been limited due to very few information sources this time of year. If you have been out, please post your observations on the Mountain Information Network (MIN).

Snowpack Summary

Forecast new snow and strong winds are expected to create small wind slabs in wind affected terrain at treeline and above.Weak layers buried around March 19th are roughly 40 cm below the surface (up to 100 cm in deeper snowpack areas). These weak layers include surface hoar on shaded aspects at high elevations and hard crusts on solar aspects and below treeline.Sugary facets may be found near the base of the snowpack in shallow, rocky snowpack areas on shady aspects.

Avalanche Problems

Wind Slabs

Forecast new snow and strong winds are expected to create small wind slabs on lee features at treeline and above.

Be cautious as you transition into wind affected terrain.Give cornices a wide berth when travelling on or below ridges.Use ridges or ribs to avoid pockets of wind loaded snow.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 1.5