Avalanche Forecast South Coast

Date Issued: Valid Until:

Avalanche Canada ghelgeson, Avalanche Canada

Avalanche Forecast

Thu Mar. 14th ยท 5:11PM

Alpine

Danger Ratings Low

Treeline

Danger Ratings Low

Below Treeline

Danger Ratings Low

Problems

Wind Slabs Wind Slabs

Alpine

Danger Ratings Moderate

Treeline

Danger Ratings Moderate

Below Treeline

Danger Ratings Moderate

Alpine

Danger Ratings Considerable

Treeline

Danger Ratings Considerable

Below Treeline

Danger Ratings Considerable
Seek out cold dry snow on higher elevation north and east aspects and watch for wind slabs in extreme terrain. Keep an eye on the effects of the sun, it could produce loose wet avalanches on south and west facing slopes Friday afternoon.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain on Saturday

Weather Forecast

Friday offers one last day of temperatures on the cool side before the heat really comes on for the first time this season. THURSDAY NIGHT: Freezing level around 1000 m, light west/southwest wind, trace of snow possible.FRIDAY: Broken cloud cover, freezing level holding around 1000 m, light to moderate west/southwest wind, no precipitation expected.SATURDAY: Broken cloud cover, freezing level rising to 1800 m, light southwest wind, no precipitation expected.SUNDAY: Clear skies, freezing level at 2700 m, light variable wind, no precipitation expected.

Avalanche Summary

No new avalanche activity was reported on Wednesday. Explosive control produced small (size 1) slab avalanches on Tuesday. No other avalanches were reported.

Snowpack Summary

Relatively light amounts of moist snow have fallen on a variety of snow surfaces including a crust on steep southerly slopes and possibly weak surface hoar crystals on sheltered and shaded slopes. The new snow may take a little time to bond, especially on northerly aspects at higher elevations. The new snow has been formed into a hard and thick crust on south facing slopes, at least in the North Shore mountains.A layer of weak and sugary faceted grains sits on a melt-freeze crust about 50 to 120 cm deep. The layer is likely most prominent in the North Shore Mountains and on north aspects. This layer continues to be reactive in snowpack tests. The problem is not typical for the region and we expect this persistent weak layer to continue to linger.The lower snowpack is generally strong.

Problems

Wind Slabs

Wind Slabs

Watch for thin wind slabs which may remain sensitive to human triggering. These are most likely to be found immediately lee of ridgecrest.

Approach lee and cross-loaded slopes with caution.Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood

Possible - Unlikely

Expected Size

1 - 2