Issued: Mar 18th, 2023 4:00PM
The alpine rating is Loose Wet., the treeline rating is , and the below treeline rating is Known problems include
Rising freezing levels and the sun can quickly destabilize the snowpack. Be aware of sun-exposed slopes and overhead hazards like cornices during the heat of the day.
On Thursday and Friday, wet-loose avalanches to size 1.5 were reported from solar slopes and steep, rocky terrain.
On Wednesday, pinwheeling was seen on solar aspects and small dry loose sluffing seen on shaded aspects.
On Tuesday, natural and skier-triggered dry loose avalanches up to size 1 were reported from the North Shore mountains.
On Monday, natural dry loose avalanches were reported from steep terrain features and explosive control initiated several storm slabs up to size 1. The storm slabs were 5 to 20 cm thick with very limited propagation and entrainment.
Daytime warming and solar radiation will promote moist snow surfaces, destabilizing the upper snowpack on all but the highest northerly slopes. Cornices loom over ridgelines and may become weak during periods warming.
The recent 40 cm of storm snow is reportedly settling and bonding to the old buried crusts. In general, the mid and lower snowpack is well-settled and bonded.
Starry sky with increasing clouds. South wind 15-20 km/hr. Treeline low temperature +3 C. Freezing level 1400 m.
Increasing cloud with precipitation forecast to begin early Monday. Southeast wind increasing to 30-40 km/hr. Treeline high temperature +8 C, freezing level spiking around 1800 m.Monday
Showers and wet flurries starting Monday, 10-15 mm. Southeast wind decreases through the day as the temperature cools. Treeline high temperature +3 C, freezing level dropping to 1500 m.Tuesday
Wet flurries, 5 mm. South wind gusting to 30 km/hr. Treeline temperature high +2 C. Freezing level 1200 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.
- Minimize exposure to sun-exposed slopes when the solar radiation is strong.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Solar radiation and warm temperatures may weaken the surface snow creating a wet avalanche hazard. Where dry snow prevails (at the highest elevations), pockets of stubborn wind slab may lurk on lee slopes.
Aspects: South East, South, South West, West.
Elevations: All elevations.
Valid until: Mar 19th, 2023 4:00PM