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

Avalanche Forecast

Dec 15th, 2012–Dec 16th, 2012
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
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
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: South Rockies.

Confidence

Fair - Intensity of incoming weather is uncertain on Monday

Weather Forecast

Overnight and Sunday: Light to moderate Southwest winds should become more westerly overnight and during the day Sunday. Very light precipitation should bring 0-2 cms during the day Sunday. Freezing level is expected to remain at valley bottom and alpine temperatures should be -12.0.Monday: The next system is forecast to move into the region by Monday morning. Expect moderate precipitation overnight bringing 5-10 cms of snow by morning and another 5 cms during the day. Strong Southwest winds are forecast during the storm and the freezing level should remain at the valley bottom.Tuesday: Cool and unsettled conditions in the wake of Mondays storm. Some convective flurries may cause another 5-8 cms during the day.

Avalanche Summary

There have been no avalanches reported in the last couple of days. We did get one report of a human triggered wind slab from about 4 days ago. With the recent cold temperatures, wind slabs may be slow to bond to the old surface.

Snowpack Summary

Variable snowpack conditions exist across the sub-regions of the South Rockies. The West of the region resembles the Lizard range with a little less overall depth to the snow pack. As you move to the East the snowpack depths gradually become more shallow. Expect to find wind slabs that have developed over the past 4-5 days in all areas at higher elevations. There continues to be some discussion about the early November rain crust. You may be able to find this crust in areas that had snow on the ground when that rain event happened. However, the crust has not been active.

Avalanche Problems

Wind Slabs

Wind slabs exist at higher elevations and at treeline in areas that were open to the Westerly winds. Wind slabs are reported to be stiff and stubborn, but may still be triggered by the additional load of a skier or rider.
Be cautious as you transition into wind affected terrain.>Stay off recent wind loaded areas until the slope has had a chance to stabilize.>Stay well to the windward side of corniced ridges.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 4