Avalanche Forecast
Issued: Feb 8th, 2015 6:58PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Loose Wet.
brian webster,
Avalanche Canada
Very warm temperatures have weakened the snowpack and turned it isothermal. Avalanche terrain should be avoided until cooler temperature return
Summary
Weather Forecast
Cloudy with scattered flurries forecast for Monday. Freezing levels to valley floor on Sunday night and then rising to 1800 m on Monday. Winds are light from the south-west turning to moderate west late in the day on Monday.
Snowpack Summary
60-90 cm of recent storm overlies a crust from January 30th. The recent heavy precipitation, wind and warmer temperatures have created storm slabs which will put an enormous amount of stress on the January 30th crust interface. Isothermal conditions exist at treeline and below.
Avalanche Summary
Avalanche control today in Yoho Park and Koorenay Park produced numerous avalanches up to size 3. Many of the avalanches started dry and turned wet at lower elevations. Also, evidence of a widespread cycle up to size 3.5 throughout the forecast region. Some avalanches running close to full path.
Confidence
Problems
Storm Slabs
50 to 90 cm of storm snow lays over the Jan 30 crust interface. A weak bond exists on this interface and storm snow avalanches are very likely.
- Minimize overhead exposure during periods of heavy loading from new snow, wind.
- Be aware of the potential for wide propagations.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Loose Wet
The snowpack is very weak at treeline and below elevations due to warm temperatures and isothermal snow conditions.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 9th, 2015 4:00PM
