Avalanche Forecast

Issued: Mar 8th, 2018 4:00PM

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

snow safety, Parks Canada

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.

Summary

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

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

Valid until: Mar 9th, 2018 4:00PM