Archived

Avalanche Forecast

Mar 8th, 2018–Mar 9th, 2018

Alpine

2: Moderate

The avalanche danger rating in the alpine will be moderate

Treeline

1: Low

The avalanche danger rating at treeline will be low

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

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

3: Considerable

The avalanche danger rating below treeline will be considerable

Regions: Little Yoho.

Warmer temperatures are on the way. Although it is forecast to be cloudy for most of the region Friday, watch locally for the effect of the sun as this could increase the avalanche danger in steep, sunny terrain.

Weather Forecast

Mainly cloudy in Little Yoho with a few cm over the day. Winds will stay mainly light from the West and temperatures will reach 0C at valley bottom and remain freezing in the alpine. A further 5-10cm is expected on Friday with increasing winds followed by clearing and a warming trend through the weekend.

Snowpack Summary

Very little wind effect overall except in the high alpine. Some sun crust on some steep solar aspects is starting to form. 10-20 cm of storm snow sits over a firm mid-pack. The Jan surface hoar layers down 100-150 cm are rounding and inactive in tests. In shallow areas the deeper facet layers remain weak but are currently dormant.

Avalanche Summary

No new avalanches were observed or reported in the Little Yoho area on Wednesday.

Confidence

Avalanche Problems

Wind Slabs

Increasing West winds have moved new snow around in the alpine forming small slabs in lee areas. Watch for these in the high alpine, especially in steep unsupported terrain where skier triggering may be possible.

Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 1.5