Archived

Avalanche Forecast

Mar 12th, 2019–Mar 13th, 2019

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

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

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: Glacier.

Weather Forecast

We could see a mixed bag of weather today. Cloudy with sunny periods is the forecast, but we may see some spring convective cells this afternoon as the day heats up. Freezing levels are forecasted to reach Highway elevation, no significant precipitation, and the wind is expected to shift to the North.

Snowpack Summary

Another 25cm of new snow brings our storm total to approximately 50cm at Tree Line. Light to moderate winds have formed soft slabs on lee aspects and cross loaded terrain features. The storm snow overlies a plethora of old surfaces including; sun crusts on solar aspects, hard wind slab in exposed areas, and surface facets in sheltered locations.

Avalanche Summary

No new avalanche activity observed in the Highway Corridor yesterday, or reported from the back country. Today we will be expecting natural activity to increase on steep solar aspects if the sun comes out. Skiers and riders will likely be able to trigger loose dry "sluffs" and storm slabs on all aspects on steep, unsupported terrain features.

Confidence

Avalanche Problems

Storm Slabs

25cm of new snow in the last 24 hours, plus the 30cm of recent storm snow, has formed soft slabs in the Alpine and exposed areas of Tree Line. Storm slabs may be overlying weak faceted snow, old wind slabs, or a sun crust.

Watch for whumpfing, hollow sounds, and shooting cracks.Use caution in alpine and open treeline lees. Recent snowfall has created storm slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5

Loose Dry

If the sun makes an appearance today, steep solar aspects will shed the new snow. Skiers will likely be able to trigger loose dry slides, on steep unsupported terrain features on all aspects.

Be cautious of sluffing in steep terrain, particularly where the debris flows into terrain traps.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2