South Coast Inland Avalanche Forecast
Issued: Mar 20th, 2021 4:00PM
The alpine rating is Wind Slabs., the treeline rating is , and the below treeline rating is Known problems include
Heightened avalanche conditions exist on steep slopes that have been loaded by the wind.
A cold front crossing the region on Sunday night will bring 10-20 cm of new snow.
SATURDAY NIGHT: Cloudy with some isolated flurries, 20-40 km/h southwest wind, treeline temperatures drop to -8 C.
SUNDAY: Cloudy with flurries picking up in the afternoon with 5-10 cm of snow by the evening, 40-60 km/h southwest wind, treeline temperatures around -5 C.
MONDAY: Another 5-10 cm of snow by the morning then sunny in the afternoon, 20-30 km/h southwest wind, treeline temperatures around -5 C.
TUESDAY: Mostly cloudy, 20-30 km/h southwest wind, treeline temperatures around -5 C.
On Friday there were reports of a few small cornice releases around the Duffey area and some glide slab releases in the Cascades. With continued wind and snowfall on Sunday, wind slabs could be reactive to human triggering on steep terrain features.
Another 5-10 cm of new snow by Sunday afternoon will add to the 15-30 cm of recent snow from the past few days. This snow has been accompanied with moderate to strong wind from the south and west, so reactive wind slabs could be found in lee terrain features. This new snow overlies a melt-freeze crust up to around 1700 m and higher on sun-exposed slopes or dry snow on northerly aspects at high elevations.
Remember that cornices along ridgelines are large at this time of year and always have the possibility of failing naturally or from the weight of a human.
Terrain and Travel
- Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
- Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Continual flurries and moderate to strong southwest wind will likely form wind slabs at upper elevations. Assess for the formation of slabs if you venture to steep, leeward terrain.
Aspects:North, North East, East, South East, North West.
Valid until: Mar 21st, 2021 4:00PM
The latest forecast danger ratings, broken down to elevation. See how an elevation is trending.