Avalanche Forecast Cascades - North West

Tuesday 8th January 2019

Avalanche Danger Ratings Tue 8th Jan 6:07PM Danger Ratings Alpine: High Danger Ratings Treeline: Considerable Danger Ratings Below Treeline: Considerable Storm Slabs Storm Slabs Loose Wet Loose Wet
Recent Trend Last 10 days' forecasts

Forecaster: Andrew Kiefer

Date Issued:

Valid Until:

The bottom line: Heavy snowfall, strong winds, and high snow levels will create very dangerous avalanche conditions. Natural avalanches are likely at upper elevations. Only travel in the mountains if you are confident in your ability to avoid avalanche terrain.

Snowpack and Avalanche Discussion

Several human-triggered avalanches were reported recently in the Mt. Baker area. On Tuesday, observers witnessed rapidly changing conditions as winds increased and began transporting snow. On steep, wind-drifted slopes near and above treeline, it was easy to trigger small avalanches 8-16in deep. Although most avalanches were small, some ran a few hundred feet downslope.

Storm Slabs Storm Slabs

Likelihood

Very Likely

Expected Size

2 - 3

Heavy snowfall will build fresh storm slabs over the next 24 hours. Wind-loaded slopes will develop thicker and more reactive slabs. Greater snow accumulations at upper elevations will create the most dangerous conditions. Avalanches within new snow could easily bury a person. Give the storm snow time to stabilize. Look for obvious signs of unstable snow like shooting cracks, collapses, and recent avalanches. Avoid travel in and below avalanche terrain during periods of heavy precipitation.

Aspects: All aspects.

Elevations: All elevations.

More
Loose Wet Loose Wet

Likelihood

Likely

Expected Size

2 - 3

Snow levels may climb to 5000ft on Wednesday. Plenty of cold dry snow from recent storms exists at the snow surface. Rain may saturate these dry snow layers producing wet avalanches. Avoid avalanche terrain during periods of rain on Wednesday. If wet avalanches run downslope, they could entrain large amounts of snow and even trigger slab avalanches. Look for roller balls and pinwheels as indicators of weakening snow surfaces. Avoid gullies and other confined terrain features where debris could pile up and increase the consequences of even a small avalanche.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

More
Offline, Anywhere Members can email a forecast to themselves, meaning it's available offline Join