Avalanche Forecast
Issued: Apr 21st, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Storm Slabs and Loose Wet.
jsmith,
Avalanche Canada
Forecast rain to mountain tops on Saturday may rapidly destabilize the recent snow and increase the likelihood of triggering recently formed storm slabs.
Back off slopes as the surface becomes moist or wet with rising temperatures.
Summary
Confidence
Avalanche Summary
No avalanches were reported on Thursday. However, observations in this region are currently very limited.
Observations are very limited at this time of year, please consider sharing any information or photos you have on the Mountain Information Network to help guide our forecasts.
Snowpack Summary
Forecast rain to mountain tops on Saturday may rapidly destabilize the recent snow and trigger a wet loose avalanche cycle.
10-25 cm of recent snow and extreme southerly wind on Thursday formed fresh storm slabs. The new snow overlies a rain crust that likely extends to mountain tops in many areas.
The middle and lower snowpack are strong and well-bonded.
Weather Summary
Friday Night
Cloudy with flurries; 3-15 cm(rain below 1000 m) / 40 km/h southwest ridgetop wind / Temperature at treeline around 0 C / Freezing level 1100 m
Saturday
Rain; 3-10 mm / 50 km/h south ridgetop wind / Temperature at treeline around 5 C / Freezing level rapidly rising to 2100 m
Sunday
Mostly cloudy with isolated flurries; 0-10 cm / 40 km/h southwest ridgetop wind / Temperature at treeline around 2 C / Freezing level 1300 m
Monday
Mix of sun and cloud / 10 km/h west ridgetop wind / Temperature at treeline around 4 C / Freezing level 1600 m
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- Back off slopes as the surface becomes moist or wet with rising temperatures.
- Expect slab conditions to change drastically as you move into wind exposed terrain.
- Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
- Use small low consequence slopes to test the bond of the new snow.
Problems
Storm Slabs
10-25 cm of recent snow and extreme southerly wind on Thursday formed fresh storm slabs that may be reactive to human triggers, especially in wind affected terrain.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Loose Wet
Forecast rain to mountain tops on Saturday may rapidly destabilize the recent snow and trigger a wet loose avalanche cycle.
Aspects: All aspects.
Elevations: All elevations.
Likelihood
Expected Size
Valid until: Apr 22nd, 2023 4:00PM
