Avalanche Forecast
Issued: Feb 23rd, 2017 4:32PM
The alpine rating is Storm Slabs and Persistent Slabs.
, the treeline rating is , and the below treeline rating is Known problems includeSummary
Confidence
Moderate - Due to the number of field observations
Weather Forecast
We're into a stable and benign weather pattern with cooling temperatures and isolated flurries.FRIDAY: Cloudy with sunny periods, light winds, alpine temperatures around -14 C.SATURDAY: Flurries starting in the afternoon with accumulations of 2-4 cm, light west winds, alpine temperatures around -14 C.SUNDAY: Flurries with trace amounts in the north and up to 10 cm in the south, light southeast winds, alpine temperatures around -12 C.
Avalanche Summary
On Thursday, a few small loose dry avalanches were reported in steep terrain., On Wednesday, as few size 1 skier triggered slabs were reported in unsupported alpine terrain and a few older size 1-2 storm slabs were reported on northerly aspects. Earlier in the week, there were several large skier triggered avalanches, including a remotely triggered size 2 wind slab near Kimberly, a skier-triggered size 2.5 persistent slab near Golden, and a remotely-triggered size 3 persistent slab near Golden. See here for a MIN report from one of the large avalanches near Golden.Small avalanches in the new storm snow remain the primary concern on Friday, but remember they have the potential to step down and trigger persistent slab avalanches.
Snowpack Summary
Light flurries over the past few days have delivered 10-25 cm of low density snow. Expect to find isolated pockets with thicker wind deposits at higher elevations as well as sun crusts forming on steep south-facing slopes. The recent snow has buried the mid-February interface, which is composed of a thick rain crust up to about 2000 m, sun crusts on steep solar aspects, and spotty surface hoar on shaded aspects. Storm snow from previous weeks is still bonding poorly to the February 3rd surface hoar / sun crust layer, which is now down 60-80 cm. A persistent weakness buried mid January is about a metre deep and the November crust is about 1.5 metres deep. These deep persistent weaknesses still have the potential to wake up and become reactive with human triggers. (See MIN post above).
Problems
Storm Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 24th, 2017 2:00PM