Thursday February 8, 2018

Saturday February 10, 2018
Friday February 9, 2018
Thursday February 8, 2018
Confidence: High - well aligned forecast models and numerous field days

Main Concerns

Cornice Fall, Loose Wet - view Avalanche Problems for detailed information.

Travel & Terrain Advice

Numerous moats and trenches have opened up in steep terrain around the base of steep rock features. Take precaution to identify these hazards prior to committing to your objective. Expect surface conditions to become a very hard slippery surface crust especially near the end of this forecast period. All mountain travelers should consider the option to travel on slopes that minimize exposure to slips and falls.

Avalanche Summary

No new natural or explosive trigger avalanches

Avalanche Problems

Cornice Fall

Cornice formation has been specific to predominantly north aspect slopes and can be found at both the treeline and the alpine. Cornices are will continue to strengthen but if triggered will produce an avalanche big enough to bury injure or kill a traveler. Take the time to identify these features and ensure appropriate travel techniques when either above or below these features.

Loose Wet

At both tree line and the alpine, expect south aspect (solar) slopes to become moist in the afternoon and in the right terrain feature its unlikely but may possible to trigger an avalanche big enough to bury injure or kill a human

Snowpack Summary

upper snow pack is unconsolidated, wet to moist. The entire alpine snow pack has settled rapidly and the mid and lower snow pack are becoming dense and very well settled

Snowpack Details

Surfacewet to moist down 30 to 40 cm
Upperunconsolidated
Midwell settled
Lowerwell settled

Past Weather

Precipitation in the form of rain combined with warm temperatures and high freezing levels persisted over the last 48 hours. Winds where predominately south west and moderate to strong . Overnight temperatures remained high preventing most snow surfaces from developing a crust and recovering. Theses factors promoted the upper snow pack to become unconsolidated and warm.

Weather Forecast

A strengthening high pressure to the south west of the region will bring clearing sky, cooling temperatures and freezing level to seas level during the overnight period.

Thursday 5 mm of precipitation, temps 3 to 0 , winds light to moderate Sw becoming Light Nw late in the afternoon, freezing level to 1500-500 m.

Friday Clear, temps -3 to -6, winds light Nw, freezing level 900 m dropping to sea level overnight.

Saturday Clear, temps -5 rising to +2, winds light Ne, freezing level 300 m rising to 900 m mid day.

Posted on Thursday February 8, 2018 by Jesse Percival

Past Bulletins