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Archived

Avalanche Forecast

Apr 20th, 2018–Apr 21st, 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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Lizard-Flathead.

Flurries on Saturday may form small wind slabs on leeward slopes below ridgetops.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

SATURDAY: Cloudy with flurries; accumulation 5-10 cm. Strong southwest wind. Alpine temperature +2. Freezing level 1800 m.SUNDAY: Sunny. Light west wind. Alpine temperature +4. Freezing level 2000 m.MONDAY: Sunny. Light east wind. Alpine temperature +5. Freezing level 2100 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

Cornices are large and looming. Forecast snow and wind on Saturday may form small wind slabs at treeline and above. Below the surface there are numerous crusts in the upper 100 cm of the snowpack. The mid-pack is generally well settled and strong.A layer of sugary facets around a crust can be found near the bottom of the snowpack which has been dormant for some time. Large triggers, such as a falling cornice, or a major warm-up to the snowpack could trigger this layer.

Avalanche Problems

Wind Slabs

Flurries on Saturday may form small wind slabs on lee features at treeline and above.
Use caution when transitioning into wind affected terrain.Avoid areas that look freshly loaded with snow; especially convex features below ridgetops.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 1.5