Avalanche Forecast

Issued: Dec 16th, 2022 2:30PM

The alpine rating is considerable, the treeline rating is moderate, and the below treeline rating is low. Known problems include Deep Persistent Slabs and Wind Slabs.

Avalanche Canada matt, Avalanche Canada

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If you do head out over the next few days, bring extra equipment to help with the cold. The cold won't cause any immediate increase in avalanche hazard, but over a few days it will start to negatively effect the deeper layers. Good luck out there and don't forget the hot tea!

Summary

Confidence

High

Avalanche Summary

No new avalanches, but visibility was poor.

Snowpack Summary

Today's trip took us into the south access for Hero's knob/Sweet 16. Like the rest of the region, there isn't a lot of snow. We had 85cm at treeline and the odd pocket of 1m. What really caught our attention was the snowpack variability based on elevation. The surface hoar from last month is very prominent up to about 2100m. This layer will vary from area to area, but be sure to have a look for it as it is notable. The other general statement is how weak and poor the regional snowpack is. There is a theme of a somewhat settled upper snowpack resting on a foundation of facets and growing depth hoar. Where the snowpack failures occur seems to vary in depth, but the failures are very, very consistent in their character. They are failing fast, with little warning. It's easy to get caught up in the semantics of layer types and descriptions, but at the end of the day we have a nasty weak layer that is predictably failing. Do your homework, dig your holes and be sure you have a good grip on your local terrain before you commit to consequential terrain.

Weather Summary

In case you haven't heard yet, it's going to get cold in the next few days. Tomorrow isn't crazy cold, a morning low of -27 and an afternoon low of -28. But later in the week it will be in the -30's. Winds will be light for most of the day tomorrow, but the windchill will be annoyingly cold. As for snow, there may be a few centimeters coming, but not enough to make a difference.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Avoid convexities, steep unsupported terrain and rocky outcroppings.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

Problems

Deep Persistent Slabs

An icon showing Deep Persistent Slabs

This layer should be monitored as elevation is gained. Despite being labelled as deep, it can be a ways off the ground. Expect this layer to get worse with the incoming cold.

Aspects: All aspects.

Elevations: All elevations.

Likelihood

Likely

Expected Size

1 - 2.5

Wind Slabs

An icon showing Wind Slabs

Watch for isolated windslabs in alpine terrain.

Aspects: All aspects.

Elevations: Alpine.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Dec 18th, 2022 4:00PM

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