Avalog Join
Archived

Avalanche Forecast

Mar 4th, 2024–Mar 5th, 2024
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Coquihalla, Harrison-Fraser, Manning, Skagit.

Danger may reach HIGH on sun affected slopes. Sun can rapidly increase avalanche danger and may produce natural avalanche activity.

Stick to low-angle and supported terrain features

Confidence

Moderate

Avalanche Summary

A MIN report from Saturday in the Coquihalla shows reactive conditions remain, with avalanches noted on unsupported features, likely remotely triggered.

Professionals remain concerned about the weak layers and are very cautious about stepping into avalanche terrain.

Snowpack Summary

Recent storm snow is beginning to settle. However, reports show this storm snow is still not bonding well to the weak layers within the snowpack. This includes a crust/facet/surface hoar layer buried 60-100 cm deep, and a widespread crust with weak facets above buried up to 130 cm deep.

Strong sunshine is expected to create moist or wet snow on south facing slopes and increase the reactivity of weak layers.

Weather Summary

Monday Night

Mostly cloudy with no snowfall expected. 20-30 km/h southwest winds. Freezing level at valley bottom.

Tuesday

Clear skies and sunny. 20-30 km/h west winds. Treeline temperature -4 °C. Freezing levels around 800 m.

Wednesday

Mostly sunny with some cloud. 10-20 km/h northwest winds. Treeline temperature -5 °C. Freezing level around 700 m.

Thursday

Mostly sunny.. 10-20 km/h northwest winds. Treeline temperature -2 °C. Freezing level around 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid being on or under sun exposed slopes.
  • Minimize exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
  • Keep in mind that human triggering potential persists as natural avalanching tapers off.

Avalanche Problems

Persistent Slabs

Buried weak layers are most concerning at treeline elevations. Small avalanches may step down to this layer resulting in very large, destructive avalanches.

Use low-angle, simple terrain to help manage this problem.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5

Wind Slabs

Larger and more reactive slabs sit on north and east facing slopes near ridges.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5