Avalanche Forecast
Issued: Jan 19th, 2017 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs.
andrew jones,
Parks Canada
The storm slab is becoming more dangerous with warming temperatures.
Summary
Weather Forecast
Mainly cloudy today as the storm begins to taper off. Light flurries are expected with light rain at times below 1500m. Ridge winds will be SW 20-35 km/h. Temperatures cool off heading into Friday but the weather remains unsettled with trace amounts of precipitation.
Snowpack Summary
Warming temperatures have consolidated 50cm of new storm snow into a slab. Southerly winds to 45 km/hr have likely redistributed this snow at ridgetop. The recent snow has buried existing wind slabs and spotty surface hoar. The mid and lower snowpack are composed of weak facetted snow from the last month's cold weather.
Avalanche Summary
A natural avalanche cycle began yesterday morning with large size 3.0 avalanches east of Rogers Pass summit. Throughout the day artillery avalanche control produced several large far-running avalanches ranging from size 2.5 to 3.5. Avalanches were easily entraining new storm snow and were accompanied by a large power cloud component.
Confidence
Problems
Storm Slabs
50cm of new snow, accompanied by moderate southerly winds and warming temperatures, has created a new storm slab . The slab is poorly bonded to a weak layer of facets and surface hoar. This slab is widespread and reactive.
The new snow will require several days to settle and stabilize.Use caution on open slopes and convex rolls
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Jan 20th, 2017 8:00AM
