Avalanche Forecast
Issued: Apr 25th, 2022 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Cornices.
dsaly,
Avalanche Canada
With spring conditions, avalanche hazard can change quickly during periods of warming or from a blast of wet spring snow. Start early and keep track of any accumulating snowfall.
Summary
Confidence
Moderate - Uncertainty is due to limitations in the field data.
Weather Forecast
MONDAY NIGHT: Increasing cloud and isolated flurries trace to 5 cm, 15-25 km/h southwest wind, alpine low temperature -3 C. Freezing level dropping to 1700 m.
TUESDAY: Wet flurries, up to 10 cm. 15-30 km/h southwest wind, alpine high temperature +1 C, freezing level rising to 2000 m.
WEDNESDAY: Scattered flurries, 5-15 cm accumulation by morning. 25-35 km/h west wind alpine high temperature +6 C, daytime freezing level 1600 m.
THURSDAY: Mix of sun and cloud. Light southwest wind, alpine high temperature +3 C, daytime freezing level rising above 1900 m.
Avalanche Summary
With warm temperatures on Saturday and Sunday, numerous loose wet avalanches occured with daytime warm temperatures. In some cases, these wet loose avalanches triggered slabs to size 2, with 30 cm crown depths.
Please consider posting your observations to the Mountain Information Network to supplement our data stream and help fellow recreationists.
Snowpack Summary
Sun and warm temperatures have moistened the snow upwards of 2500 m and on all sun-exposed slopes. Cold, dry snow persists on north-facing aspects in the high alpine; in these areas use caution entering steep, and extreme terrain, where lingering wind slabs could be found. At ridge top, remember that cornices are large and looming.
Around 100 to 200 cm deep, faceted grains persist around a hard melt-freeze crust from early December. There's uncertainty on if and when this layer will wake up, but it could during the next intense or prolonged warm-up.
Terrain and Travel
- Make observations and assess conditions continually as you travel.
- Back off slopes as the surface becomes moist or wet with rising temperatures.
- Pay attention to cornices and give them a wide berth when traveling on or below ridges.
Problems
Wind Slabs
A dusting of wet flurries is forecast to start late Tuesday. Any fresh snow will slide easy on the crust below. Take care where wind moves snow to deeper, more cohesive deposits.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Cornices
Cornices are large and fragile. Warm temperatures and sun, or loading from rain or snow increases their likelihood of failure. Any release could be catastrophic.
Aspects: North, North East, East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Apr 28th, 2022 4:00PM
