A wet and warm storm will drop upwards of 25-50 cm through Monday. Along with strong, gusty winds and spiking freezing levels, expect rapid storm slab development and avalanche hazard increasing to HIGH near the end of the day.
A wet and warm storm will drop around 10 cm by Monday morning and upwards of 25-50 cm through the day. Along with strong, southwesterly winds and spiking freezing levels, expect rapid storm slab development and avalanche hazard increasing to HIGH near the end of the day.
As freezing levels spike late Monday (and areas that get rain instead of snow), a wet loose hazard will persist anywhere the snowpack is moist or wet.
SUNDAY NIGHT: Flurries and snow, 5-10 cm by morning / Moderate, increasing to strong, south-southwest ridgetop wind / alpine low temperature -3 / Freezing level 1400 m
MONDAY: Snow, 20-50 cm / Strong, south-southwest ridgetop wind / alpine high temperature +1 / Freezing level rising to 2100 m
TUESDAY: Snow and flurries, 10-30 cm / Moderate, gusty southwest ridgetop wind / alpine high temperature -2 / Freezing level 2100 m and dropping
WEDNESDAY: Isolated flurries / Light, west ridgetop wind / alpine high temperature -3 / Freezing level 1000 m
Outside of a few small loose-wet avalanches from steep terrain, there have been no avalanche observations since last Wednesday (Nov 2) when natural widespread wet loose avalanche cycle up to size 3 was triggered by warming.
Have you been out and about in the mountains? If so please submit to the Mountain Information Network (MIN). It doesn't have to be technical it can be as simple as a photo. Photos are especially helpful! Sending out a big thank you to the already submitted MIN's this season. Thanks everyone!
A melt-freeze crust covers most slopes resulting from recent sun and warm temperatures. Where cold, dry snow prevailed (upper elevations on more shaded and polar slopes), winds continue to press slabs into lee features. The snowpack depth varies with elevation. Below treeline 30 to 70 cm, 80 to 100 cm near treeline, and over 150 cm may be found in the alpine.
The mid to lower snowpack contains a series of crusts, the most notable of which is also the deepest, sitting just above the ground at elevations above 1500 m. This crust may have a thin overlying layer of weak faceted grains and/or surface hoar crystals, especially in sheltered areas around treeline. The incoming storm may provide insight on if these layers will be a concern going forward.
