Register
Get forecast notifications
Create an account to receive email notifications when forecasts are published.
Login
Archived

Avalanche Forecast

Apr 20th, 2024–Apr 21st, 2024
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Glacier.

Wind and new snow will increase the hazard at upper elevations.

Be cautious as you transition into open terrain.

Confidence

Moderate

Avalanche Summary

There were a few small loose snow avalanches from rocky/extreme terrain in the last couple days.

A field team on Wednesday observed a natural size 2 wind slab avalanche which started at ridge top and ran on north facing terrain. Explosive control on Wed produced a size 1.5 wind-slab from a tree-line slide path.

Last weekend there was a natural avalanche cycle triggered by strong sun and high freezing levels. All observed avalanches were loose/wet and no bigger than size 2.5.

Snowpack Summary

Incoming new snow will fall on a series of crusts from the recent warm spring weather on all but high north aspects, which were still holding dry snow.

The Feb 3rd crust is the dominant mid-pack layer down ~110cms and still produces isolated planer results when tested.

Below tree-line, the snowpack has gone through many melt-freeze cycles, and is in spring conditions. Expect challenging travel at lower elevations.

Weather Summary

Light precip & increased winds are forecast, as a low pressure system passes our area.

Tonight: Increasing cloud, isolated flurries. Alpine low of -8°C. Moderate SW ridgetop winds.

Sun: Flurries (9cm). Alpine High -5°C, Freezing level (FZL) 1500m. Mod gusting strong W winds.

Mon: Cloudy, isolated flurries. Low -7 °C, High -2 °C. FZL 1900m. Moderate W winds.

Tues: Mix of sun and cloud. Low -3 °C, High 4 °C. FZL 2500m.

Terrain and Travel Advice

  • Be carefull around freshly wind loaded features.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.

Avalanche Problems

Wind Slabs

Strong gusty winds and fresh snow will build a new windslab problem. Expect to find this problem most reactive in the lee sides of ridges or in cross loaded terrain in the alpine.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5