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Archived

Avalanche Forecast

Mar 28th, 2015–Mar 29th, 2015
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
1: Low
The avalanche danger rating below treeline will be low
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

The amount of overnight freeze and solar input will be key to the danger ratings Sunday. If it does not freeze, danger ratings will be higher than listed, especially at treeline and below. SH

Weather Forecast

Freezing levels are forecast to valley bottom Sunday Morning and up to 2100m in the afternoon.  Only trace amounts of precipitation are forecast.  Winds will be moderate to Strong from the W and mainly cloudy conditions.

Snowpack Summary

Rain below 2200m for most of the day Saturday saturating the snowpack at treeline and below.  Many areas below treeline are now below threshold or isothermal.  Alpine temperatures stayed below freezing Sat.  Up to 15cm snow has formed some lee wind slabs near ridge crests. Overall the snowpack is well settled in this region.

Avalanche Summary

Lots of loose/wet avalanches today up to size 2 occurring at treeline and below with limited visibility into the alpine. 

Confidence

Freezing levels are uncertain on Sunday

Avalanche Problems

Wind Slabs

Wind slabs that have formed from recent snow are generally bonding well to the surfaces below. These will be sensitive in the short term in the immediate lees of ridge crests.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

The amount of overnight freeze and solar input will dictate the amount of avalanche activity Sunday.  There is currently a lot of heat and moisture held in the snowpack. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2