Avalog Join
Archived

Avalanche Forecast

Apr 5th, 2013–Apr 6th, 2013
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Rockies.

Confidence

Fair - Freezing levels are uncertain on Saturday

Weather Forecast

Overnight and Saturday: The second of three waves of precipitation is expected to make its way to the interior by early morning. Expect 8-12 cms of new snow to fall above 2200 metres elevation combined with moderate winds gusting to strong from the Southwest. Alpine temperatures should drop to about -6.0 overnight and rise to -3.0 during the day.Sunday: Expect a slight cooling trend in the wake of the second wave. The third wave of precipitation should move into the interior by the afternoon, combined with light Southerly winds.Monday: Conditions should start to dry out in the wake of the third wave of precipitation.

Avalanche Summary

Loose wet slides continue to fall out of steep terrain.

Snowpack Summary

The classic melt freeze cycle has come to an end with cloud and warm temps preventing a good refreeze in most of the forecast region. Along with the solar aspects, previously dry north facing zones in the alpine are also now moist. A buried rain crust can be found down 25-50 cm and exists up to around 2100 m.  Larger triggers such as a loose wet slide, or cornice fall may cause this layer to fail. Snow may be isothermal on south facing aspects in the alpine/treeline and on all aspects below treeline.

Avalanche Problems

Loose Wet

Loose wet slides may release naturally due to continued loading from rain, and the lack of an overnight re-freeze.
Avoid all avalanche terrain during periods of heavy loading from new snow, wind, or rain.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 4

Wind Slabs

New wind slabs are expected to develop as the rain turns to snow at higher elevations.
Avoid freshly wind loaded features.>Extra caution needed around cornices with current conditions.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 4