Avalanche Forecast
Issued: Jan 15th, 2017 8:04AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs.
percy woods,
Parks Canada
Watch for pockets of surface windslab in the alpine. Avoid steep unsupported terrain features.
Summary
Weather Forecast
Temperatures continue to moderate today as warm Pacific air moves in. Today, an alpine high of -7C with ridgetop winds SW 15-25km/h are forecast with a rising freezing level coming up to 1000m. A strong SW flow of warm Pacific moisture is on route starting Monday bringing 2 to 3 days of heavy snowfall. Watch for rapidly rising avalanche danger.
Snowpack Summary
Strong N'ly winds formed widespread windslab in the alpine over New Years. More recently thin pockets of surface slab formed and occasionally have been reactive on unsupported features. In protected areas you may find faceted soft snow. Surface hoar is well developed in the valley bottoms and shifting to tiny needle like forms at higher elevations.
Avalanche Summary
Five new slides were observed in the highway corridor yesterday up to size 2.5. These slides were generally running out of steep unskiable terrain. No new natural activity was observed by field staff in the back country yesterday.
Confidence
Timing, track, or intensity of incoming weather system is uncertain
Problems
Wind Slabs
Thin stiff windslabs exist along ridge crests and cross loaded features formed by moderate SW winds. These slabs are variable in distribution so take time to assess slopes independently. Avoid convex rolls and unsupported terrain.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Avoid convexities or areas with a thin or variable snowpack.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Jan 16th, 2017 8:00AM
