| Monday | Tuesday | Wednesday | |
|---|---|---|---|
| Alpine | 4 High | 4 High | 3 Considerable |
| At Treeline | 4 High | 4 High | 3 Considerable |
| Below Treeline | 3 Considerable | 3 Considerable | 2 Moderate |
| Monday | Tuesday | Wednesday | |
|---|---|---|---|
| Alpine | 4 High | 4 High | 3 Considerable |
| At Treeline | 4 High | 4 High | 3 Considerable |
| Below Treeline | 3 Considerable | 3 Considerable | 2 Moderate |
The orange segments show which aspects are most affected by the primary concern. If the icon is completely orange, this means the primary concern exists on all slopes.
Alpine, Treeline and Below Treeline are separate zones with distinct characteristics. The arrow points to the zones most affected by the primary concern. For more information on elevation zones, click here.
Indicates the time of day where the primary concern is likely to be a problem. Avalanche conditions can change between shady, cool mornings and sunny, warm afternoons. If both icons appear, it means the primary concern is present all day.
The 40-60cm of new snow that fell on Thursday and Friday has stressed and awoken a number of buried surface hoar layers. On Monday and Tuesday temperatures will rise and increase the likelihood of avalanche activity. Rider triggered avalanches are likely in the alpine and treeline.
The orange segments show which aspects are most affected by the primary concern. If the icon is completely orange, this means the primary concern exists on all slopes.
Alpine, Treeline and Below Treeline are separate zones with distinct characteristics. The arrow points to the zones most affected by the primary concern. For more information on elevation zones, click here.
Indicates the time of day where the primary concern is likely to be a problem. Avalanche conditions can change between shady, cool mornings and sunny, warm afternoons. If both icons appear, it means the primary concern is present all day.
On Monday and Tuesday temperatures will rise and increase the likelihood of avalanche activity.
The orange segments show which aspects are most affected by the primary concern. If the icon is completely orange, this means the primary concern exists on all slopes.
Alpine, Treeline and Below Treeline are separate zones with distinct characteristics. The arrow points to the zones most affected by the primary concern. For more information on elevation zones, click here.
Indicates the time of day where the primary concern is likely to be a problem. Avalanche conditions can change between shady, cool mornings and sunny, warm afternoons. If both icons appear, it means the primary concern is present all day.
Warm air temperatures and direct solar radiation should increase the hazard on these aspects even before noon
Boulder Mountain Avalanche Incident Revelstoke B.C. Saturday March 13, 2010 3pm. Slab, size 2.5 – 3, incline: “steep,” NE aspect, low Alpine feature (~2300m), main section that affected the people involved ~300m wide, significantly more fracture line wraps around shoulder, perhaps another 300m, linear run about 700m including running over a bench at about 2000m then down a steep slope below to edge of mature timber. Depth of debris up to 3m. Two fatalities, 19 hospitalized (1 critical, 3 serious). Tens of sleds destroyed or seriously damaged. Rescue winding down. Miracle that no more people were killed or injured.
For more details click the following link:
http://bc.rcmp.ca/ViewPage.action?siteNodeId=50&languageId=1&contentId=13832
Monday and Tuesday: Cloudy with sunny breaks. Freezing levels are expected to rise to 2000m.
Wednesday: The next weather system, currently off the coast, is expected to bring light snowfall amounts to the region.
Natural, explosive, skier, and machine triggered avalanche to size 3.0 are continuing to be reported (See Special Message section). Several of these avalanches were triggered from a distance away.
On Monday and Tuesday, rider triggered avalanches will be likely in the alpine and at tree line due to warm air temperatures. Natural avalanche activity is likely at tree-line elevations. On south and west facing slopes natural point release and slab avalanches are likely as the surface snow becomes moist or wet in the afternoon due to intense radiation from the Sun.
Terrain to Avoid: All north aspects over 25-30 degrees are likely ripe for triggering deep slabs and would be good to avoid for now. Be especially wary of wind-loaded features near ridgeline. South aspects may be a bit better early on but daytime warming could destabilize the recent storm slab and it would be necessary to avoid exposure to these aspects later in the afternoon. Avoid exposing yourself to slopes above, especially to those with cornices.
Techniques to Manage Risk: Basically wait a few days. If you can’t do that, really stick to flat terrain. If you are getting on any slope that would be steep enough to slide on make sure you well away from steep slopes above, terrain traps below or any convexities. Unfortunately surface hoar weaknesses take time to stabilize and may not, unless we get more snow, so this condition may persist for some time to come. Travelling on south aspects may be a better choice right now, even if it’s breakable crust, but remember to be off them very early before they quickly deteriorate.
The storm produced 40-60 cm which covers old sun crusts on southerly aspects and surface hoar layers on north and east aspects. A number of surface hoar layers exist and some remain well within the skier or sled triggering range. The March 7 is now down 50-70cm. The Feb 24 down 80-100cm. Feb 8 down 90-120. Each of these layers has a potential to release. The February 8th and 24th layers are producing moderate stability test results with sudden planar shears. The March 7 layer is prominent in some areas and not in others.
Prepared by Mark Bender,
You can use the link below to subscribe to our RSS feed for the bulletins from this region in your browser.
Recent avalanche incidents for this region. To view all reported incidents please check out the discussion forum:
