Avalanche Forecast Little Yoho

Thursday 31st January 2019

Avalanche Danger Ratings Thu 31st Jan 6:11PM Danger Ratings Alpine: Moderate Danger Ratings Treeline: Moderate Danger Ratings Below Treeline: Low Wind Slabs Wind Slabs Deep Persistent Slabs Deep Persistent Slabs

Parks Canada Forecaster: brian webster

Date Issued:

Valid Until:

Friday marks a change in conditions with an incoming storm. Pay attention to new snowfall amounts and what the wind is doing.

Weather Forecast

Snow beginning on Friday with various models forecasting between 10 and 20 cm along the divide by the end of the day. More snow on Saturday (up to 30 cm) and then very cold arctic air settles in for Sunday. Winds forecast to be mod to strong from the SW on Friday.

Snowpack Summary

Some wind effect in alpine and small windslabs exist in immediate lees. The mid and lower pack is generally well settled.

Avalanche Summary

No new avalanche activity

Confidence

Intensity of incoming weather systems is uncertain on Friday

Wind Slabs Wind Slabs

Likelihood

Possible

Expected Size

1 - 1.5

Fresh wind slabs can be expected from forecasted new snow and winds on Friday.

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

Elevations: Alpine, Treeline.

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Deep Persistent Slabs Deep Persistent Slabs

Likelihood

Unlikely

Expected Size

1 - 3

In Little Yoho the mid and lower pack is generally well settled with no significant shears. In some areas where the snowpack is shallower the Dec 10 persistent facet layer is producing shears in the hard range.

Avoid thin, rocky or unsupported slopes.

Aspects: All aspects.

Elevations: Alpine.

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