Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Nov 22nd, 2012–Nov 23rd, 2012

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Northwest Inland.

This bulletin is based on limited data. Local variations in conditions are likely to exist. Check out the forecaster's blog for further details on interpreting early season bulletins.

Confidence

Poor - Due to limited field observations for the entire period

Weather Forecast

Friday: The main frontal system is expected to have gone through by friday morning leaving good amounts of precipitation accompanied by strong to extreme winds from the SouthEast. Accumulations should persist throughout the day moderately which could leave another 10 cm and the wind should also persist however more in the moderate range. Saturday and Sunday: Temperatures are expected to remain cool for the weekend and winds to blow moderately from the West. It looks like there could also be some more light precipitation on Sunday.

Avalanche Summary

There has been no new avalanche reported in the region but if you have any avalanche observation to report, please send us an email. A report from the Hankin-Evelyn area at the beginning of the month included a small human-triggered slab avalanche starting from a thin rock area. The slab was approximately 20cm deep and 8m and, ran full path with 70cm of deposition in the runout.

Snowpack Summary

Snow depth varies  from 60cm in the Northern part of the region to around 100cm in the Southern part of the region. Weather stations around the region recorded around 10 cm of new snow in the last 24 hours. With the heavy precipitation forecasted in some parts of the region and the strong winds blowing from the South, we expect new wind slabs to form on top of that 10 cm layer in the alpine and treeline on the Northerly aspects.  It is likely that these 2 layers will take some time to bond and that avalanches could be triggered naturally or by additional light loads such as a person.  The information is limited to produce our avalanche bulletins at this time of the year, so any information you have about the snowpack, please communicate with us by email.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.