Avalanche Forecast

Issued: Apr 21st, 2018 4:18PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

jsmith, Avalanche Canada

Northwest Inland.

Lingering wind slabs may still be reactive to human triggers on leeward slopes below ridgetops.

Summary

Confidence

Low - Due to the number of field observations

Weather Forecast

SUNDAY: Mix of sun and cloud. Light southwest wind. Alpine temperature -4. Freezing level 1300 m. MONDAY: Mix of sun and cloud. Moderate to strong southwest wind. Alpine temperature +1. Freezing level 1700 m. TUESDAY: Mix of sun and cloud. Moderate southwest wind. Alpine temperature +1. Freezing level 1700 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

Flurries and moderate southwesterly winds may have formed small wind slabs below ridgetops.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.

Problems

Wind Slabs

Lingering wind slabs may still be reactive to human triggers on leeward slopes below ridgetops.

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

Possible

Expected Size

1 - 1.5

Valid until: Apr 22nd, 2018 2:00PM