Avalanche Forecast
Regions: Little Yoho.
An upslope storm will occur Sunday. This should mean less snow in the Little Yoho region. Watch locally for sloughing if more than expected occurs, especially where it lies over a crust.
Weather Forecast
A NE flow will develop Saturday night bringing more snow to the East side of the Rockies. Amounts in Little Yoho should be around 5cm. Temperatures will start to drop in the AM with alpine temperatures going down to -15C, and valley bottom temperatures around 0C. This cooling will continue Monday.
Snowpack Summary
Surface crusts present on solar aspects and all aspects up to 2200 m in the morning, quickly turning to wet snow as the day warms up. High elevation north aspects still holding dry snow. Several persistent layers exist in the mid to lower snowpack from earlier in the winter that may become active layers again over the next 48 hr as things heat up.
Avalanche Summary
On Friday and Saturday explosive control on the 93 S and in Yoho produced good results up to size 3 with small slabs at treeline gouging into deeper layers at lower elevations and running full path. Widespread natural loose wet avalanche activity up to size 2 was also observed at all elevations.
Confidence
Avalanche Problems
Loose Dry
Watch locally for snow amounts that occur Sunday. Where these overly crusts sloughing is a possibility if there is a poor bond, especially in gullies.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Unlikely - Possible
Expected Size: 1 - 1.5
Persistent Slabs
Cooler temperatures may decrease the likelihood of deeper layers in the mid to lower snowpack being triggered. If there is a poor freeze or one of the many large cornices fails, larger avalanches on these layers are still a possibility.
- Pay attention to overhead hazards like cornices which could trigger persistent slabs.
- Pockets of persistent slabs linger on alpine lee features.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood: Unlikely - Possible
Expected Size: 2 - 3.5