Banff Yoho & Kootenay National Park Avalanche Forecast

Issued: Apr 25th, 2021 4:01PM

Sun Apr 25th Current Conditions
Alpine Below Threshold Treeline Below Threshold Below Treeline Below Threshold
Mon Apr 26th 2 Day Outlook
Alpine Below Threshold Treeline Below Threshold Below Treeline Below Threshold
Tue Apr 27th 3 Day Outlook
Alpine Below Threshold Treeline Below Threshold Below Treeline Below Threshold

The alpine rating is below threshold, the treeline rating is below threshold, and the below treeline rating is below threshold. Known problems include Loose Wet and Wind Slabs.

Preserved powder remains on high North aspects providing great ski conditions.

Click the "More Spring Conditions details" link found below for information on various spring condition scenarios.

Summary

Weather Forecast

Clearing trend starting Monday will continue through the week. As this ridge of high pressure develops, upper elevation winds will increase. We can expect 2000m freezing levels Monday, though it might feel much warmer on Southerly aspects.

Snowpack Summary

10 to 25 cm of low density snow has buried crusts on all aspects to 2200 m and to ridge top on solar slopes. There are several persistent layers in the mid to lower snowpack that are likely only a concern on alpine north facing terrain where no crusts are found in the snowpack while temperatures remain cool.

Avalanche Summary

No new avalanche activity observed or reported Sunday. The clearing trend this week will increase the loose wet avalanche activity. This will likely begin with releases of surface snow above the crust and as temperatures increase later in the week we could see deeper loose wet avalanches.

Confidence

Problems

Loose Wet

An icon showing Loose Wet

Likelihood

Likely

Expected Size

1 - 2

As the clearing trend begins Monday we can expect to see an increase of loose wet avalanche activity. This will predominantly be on solar aspects though we could see activity on all aspects at lower elevations.

  • Avoid slopes when the solar radiation is strong, especially if they have large cornices overhead.
  • Use caution on solar slopes if the snow is moist or wet.

Aspects:

South East, South, South West, West.

Elevations:

All elevations.

Wind Slabs

An icon showing Wind Slabs

Likelihood

Possible - Unlikely

Expected Size

1 - 2

Increase winds Monday will begging to develop wind slabs at upper elevations. We have some uncertainty on how the new load will bond with the current buried crust .

  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects:

North East, East, South East.

Elevations:

Alpine.

Valid until: Apr 26th, 2021 4:00PM

Forecast Trend

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