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Avalanche Forecast

Mar 6th, 2019–Mar 7th, 2019
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: South Rockies.

With highly localized but intense snow showers in the forecast some valleys could receive more new snow than expected. If there is more than 20 cm of new snow avalanche danger could be CONSIDERABLE

Confidence

Moderate - Forecast snowfall amounts are uncertain

Weather Forecast

WEDNESDAY NIGHT: Approach and passage of a weather disturbance. I hesitate to call it a storm. Moderate but gusty south and southwest winds, with around 5 cm of snow. THURSDAY: Moderate to strong westerly winds, with another few centimetres of snow. It's possible that some valleys receive short-lived but intense snow showers delivering up to 10cm of snow. Overcast sky with warmer temperatures, in the -5 to -10 C range.FRIDAY: Return to bluer skies, no new precipitation. Continued moderate southwest wind, and daytime temps around -5 to -10 C.SATURDAY: Similar to Friday but with light westerly winds.

Avalanche Summary

No new avalanches were reported on Wednesday. One small (size 1) slab and a few loose dry avalanches were triggered in steep terrain on Monday. A few size 1 wind slab avalanches were triggered by skiers over the weekend.

Snowpack Summary

New windslabs will form in Alpine and possibly Treeline areas with forecast weather overnight Wednesday and Thursday. Cold temperatures have transformed most of the snowpack into weaker faceted snow with few if any distinct layers, with the exception alpine terrain where hard wind slabs and wind pressed snow are found.In deep snowpack areas, you may find a slab sitting above a layer of facets and surface hoar that was buried in mid-January and is now 30-60 cm deep. The layer is most prominent in the Elk Valley between 1600 m and 1900 m, but no recent avalanche activity has been reported on this layer.

Avalanche Problems

Wind Slabs

Forecast wind and snow will form windslabs on lee slopes and behind smaller terrain features.
Be aware of the potential for wide propagations due to the presence of hard windslabs.Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Whumpfing, shooting cracks and recent avalanches are all strong inicators of unstable snowpack.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2