Bulletin d’avalanche South Rockies — Nov 21, 2015

Points saillants

It's early in the season but there is more than enough snow for avalanches. If you are out in the mountains, please post your observations to the Mountain Information Network.

Problèmes avalancheux

Wind Slabs
N
NE
E
SE
S
SW
W
NW
Alpin
Limite forestière
Sous la limite forestière
Probabilité
Possible
Taille
1–3
It may still be possible to trigger a wind slab in the alpine, especially on steep, unsupported slopes.

Snowpack Summary

Snowpack observations have been very limited as the season commences. Initial reports suggest that there is enough snow above around 1700m for avalanches to occur. A thick surface crust exists to around treeline elevation. Recent wind may have formed thin wind slabs in the alpine.

Confidence

Poor - Due to the number of field observations

Weather Forecast

High pressure will remain the dominant feature on Sunday. Partly sunny and dry conditions are expected. A temperature inversion is possible and alpine winds are expected to be moderate from the NW. A weak storm system is forecast to reach the region Monday afternoon or evening. Increasing cloudiness is expected during the day and alpine winds will increase to moderate or strong from the SW. Freezing levels are forecast to reach 1200-1500m on Monday afternoon. Cold arctic air is expected to reach the region on Tuesday. As the cold front passes, snowfall is expected to valley bottom. Models are currently showing 5-10mm of precipitation on Tuesday.

Avalanche Summary

No recent avalanches have been reported. There was a natural avalanche cycle in the alpine last week during the storm.

South Rockies

Danger d’avalanche