Banff Yoho & Kootenay National Park Avalanche Forecast

Issued: Mar 19th, 2021 4:00PM

Fri Mar 19th Current Conditions
Alpine Low Treeline Low Below Treeline Moderate
Sat Mar 20th 2 Day Outlook
Alpine Low Treeline Low Below Treeline Moderate
Sun Mar 21st 3 Day Outlook
Alpine Moderate Treeline Low Below Treeline Moderate

The alpine rating is low, the treeline rating is low, and the below treeline rating is moderate. Known problems include Loose Wet.

While new snow has started to accumulate over the solar crusts, the snowpack at low elevations has been weakened with a poor freeze and rain. Watch temperatures carefully as you plan  your weekend.

Summary

Weather Forecast

Convective activity Friday afternoon is expected to clear overnight allowing for a weak freeze to around 1500m Saturday morning. Building cloud will bring flurries Saturday and perhaps 5-10cm closer to the divide.  SW winds will start of in the moderate range in the alpine Saturday but can be expected to increase to the strong range.

Snowpack Summary

5-10 cm of new snow fell Friday with rain and no freeze below 1500m. The new snow now buries sun crust on steep solar aspects (East to West) into the Alpine, a temperature crust on all aspects below 1800m and  Surface hoar up to 10mm located in isolated, shaded areas.

Avalanche Summary

A few loose wet avalanches were observed today on Mt Dennis below the freezing level. Thursday, Lake Louise ski patrol ra few reported natural and skier controlled loose wet avalanches in steep, rocky and thin snowpack features located on  solar slopes below treeline with intense solar heating.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Saturday

Problems

Loose Wet

An icon showing Loose Wet

Likelihood

Possible

Expected Size

1 - 2

Poor crust recovery Thursday night combined with rain below 1500m has weakened the snowpack at valley bottom levels. At higher elevations new snow over crusts will become moist quickly with solar inputs.

  • If triggered, loose wet sluffs may step down to deeper layers resulting in larger avalanches.
  • Use extra caution on slopes if the snow is moist or wet.

Aspects:

All aspects.

Elevations:

Treeline, Below Treeline.

Valid until: Mar 20th, 2021 4:00PM

Forecast Trend

The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.