Friday March 1, 2019

Friday March 1, 2019
Saturday March 2, 2019
Sunday March 3, 2019
Confidence: Moderate - Limited Alpine Field Observations

Main Concerns

Persistent Slab, Wind Slab, Loose Dry - view Avalanche Problems for detailed information.

Travel & Terrain Advice

When entering avalanche terrain careful snow pack evaluation, cautious route-finding and careful conservative decision making is essential.

Utilize low to moderate angled terrain and choose well supported paths and features.

Avoid unsupported, convex and steep terrain.

Caution on solar aspects during periods of daytime warming.

Avalanche Summary

No new avalanches have been observed.

We are seeking public financial support to help VIACS maintain our public safety service. If you’d like donate you can do so at the bottom of this page or if you have questions or ideas please email us at forecaster@islandavalanchebulletin.com.

Avalanche Problems

Persistent Slab

Down up to 1 meter facets can be found sitting on top of and below a very dense melt freeze crust at all aspects and elevations. This avalanche problem is in isolated shallow terrain on all aspects and elevations and is becoming less reactive and may be dormant however it may still be likely to be reactive in shallow snow pack areas to light triggers such a skiers. If triggered this dangerous avalanche problem could produce avalanches to size two.

Wind Slab

Found on predominately northerly aspects and on isolated protected areas on all aspects. The elevations to find this avalanche problem will be In the alpine and at treeline. Wind slabs are beginning to settle and bond and it may be possible for light triggers such as skiers to initiate. If triggered this avalanche problem could produce avalanches to size two.

Loose Dry

New and past unconsolidated and low density snow will be easy to initiate with light triggers such as skiers. These avalanches will be found at all elevations and be specific to steep terrain and especially incised gully features. Expect these avalanche to trigger easy and be initially small but may gain enough mass to produce a size 2 avalanche .

Snowpack Summary

A reactive and persistent melt freeze crust with facets both above and below can be found at all aspects and elevations.

Alpine: New snow may have buried surface hoar in protected areas and below this remains low density snow that is beginning to bond to the old surface. In the upper and mid snow pack a variety of layers can be found and this includes the faceted melt freeze crust. The mid and lower snow pack is well settled

Tree Line: New snow may have buried surface hoar in protected areas and below this remains low density snow that is beginning to bond to the old surface. In protected areas surface hoar has been buried down 20- 30 cm. The faceted melt freeze crust can be found down between 60 and 90 cm and is producing resistant planar failures during moderate testing. mid and lower snow pack is dense and well settled

Below Treeline: New snow may have buried surface hoar in protected areas and below this remains low density snow. In protected areas surface hoar has been buried down up to 30 cm. The faceted melt freeze crust can be found down between 50 to 60 cm and is reactive during moderate testing. Mid and lower snow pack is dense and well settled.

Snowpack Details

SurfaceNew low density snow.
Upperlow density snow remains preserved and up to 30 cm in sheltered areas this can be found on top of surface hoar. Found between 60 and 90 cm in depth a well established melt freeze crust exists with a layer of facets both above and below it.
MidBelow 100 to 120 centimeters a very dense and well settle can be found.
LowerWell settled and dense.

Past Weather

Up to 10 cm of new low density snow was received with light south winds. Temperatures remained cool with direct solar aspects receiving enough effect from the sun to moisten the upper surface and then refreeze overnight into a thin breakable crust.

Weather Forecast

Friday: 1 cm of new snow, Temperatures -2 to 2, Light ridge top winds from the North West, Freezing Level to 700 meters.

Saturday: 2-8 cm of new snow, Temperatures -2 to -2, Light ridge top winds from the South West, Freezing Level to 700 meters.

Sunday: 1 cm of new snow ,Temperatures -8 to -3, Light to Moderate ridge top winds from the East, Freezing Level to 600 meters.

Posted on Thursday February 28, 2019 by Jesse Percival

Past Bulletins