Avalanche Forecast

Issued: Apr 27th, 2014 4:00PM

The alpine rating is low, the treeline rating is low, and the below treeline rating is low. Known problems include Loose Wet, Storm Slabs and Deep Persistent Slabs.

a.l. horton, Parks Canada

Jasper.

The avalanche danger is Low as long as the melt freeze crust remains intact. The danger will rise rapidly as the crust deteriorates with sun exposure and daytime heating. Check out this link for more info about the spring avalanche condition.

Summary

Weather Forecast

Spring conditions are here with warming daytime temperatures, sunny skies and cool nights. These conditions will develop a supportive overnight crust that will breakdown rapidly by late morning.Â

Snowpack Summary

There is rain crust from the valley bottom to 2,350m and a sun crust into Alpine on solar aspects. Settled wind slabs are on NE aspects from 2,000 m to the alpine. Moist and wet snow exists below the crust extending into the alpine on solar aspects. The mid-pack is solid on North aspects. Large cornices.

Avalanche Summary

No field trips today.

Confidence

The weather pattern is stable on Monday

Problems

Loose Wet

Loose wet avalanches can be expected on sunny south facing aspects as temperatures rise during the day.

Travel early before the heat of the day, and avoid big slopes in the afternoon.

Aspects: North, North East, East, South East, South.

Elevations: All elevations.

Likelihood

Possible - Likely

Expected Size

1 - 3

Storm Slabs

Slabs that formed on the April 22 crust have not been reactive lately. It is still possible to trigger these slabs on steep terrain below ridgelines or convex features.

Be cautious as you transition into wind affected terrain.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2

Deep Persistent Slabs

Cornice failures or triggering from thin spots have the potential to initiate deep avalanches. Depending on aspect, these could be a wet or dry slab characteristic.

Be aware of thin areas that may propogate to deeper instabilites.Pay attention to overhead hazards like cornices.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

2 - 3

Valid until: Apr 28th, 2014 4:00PM