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Archived

Avalanche Forecast

Jan 4th, 2019–Jan 5th, 2019
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

A natural avalanche cycle continues today as winds pick up. The new snow will require time to stabilize.

Weather Forecast

Snowfall is tapering off but another 10cm is still expected for today. Strong alpine winds from the southwest will gust to 60km/hr as a cold front passes through the area. The freezing level will rise to 1500m with an alpine temperature of -4. A slight rise in the barometer brings sun and cloud for saturday before flurries return on Sunday.

Snowpack Summary

The past 48hrs has seen almost 100cm of new snow. A touchy storm slab is widespread on all aspects and elevations. This morning winds increased from moderate to extreme, creating heavily loaded pockets on north aspects. Persistent weak layers from December are buried deep in the snowpack. An early season crust is decomposing at or near the ground.

Avalanche Summary

Artillery avalanche control produced numerous large avalanches with many artillery rounds triggering multiple avalanches in adjacent targets. A widespread natural avalanche cycle that began yesterday remains active today. Remote avalanche sensors identified a large natural avalanche in Connaught Creek that coincided with extreme winds this morning.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Storm Slabs

Rapid loading and strong winds have created storm slabs at all elevations and aspects. Avalanches can run well into the valley bottom. Natural and human triggered avalanches will be very likely to almost certain as the winds pick up this morning.
The new snow will require several days to settle and stabilize.Avoid exposure to overhead avalanche terrain, large avalanches may reach the end of run out zones.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 2 - 4