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Archived

Avalanche Forecast

Nov 18th, 2020–Nov 19th, 2020
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
3: Considerable
The avalanche danger rating in the alpine will be considerable
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

Regions: Glacier.

The saying "Patience is a virtue" captures the mindset we should try and employ. As temperatures cool, riding conditions will improve, and our Avalanche hazard will decrease.

Weather Forecast

It's still unseasonably warm out, but we should start to see a cooling trend over the next few days.

Today: A mixed bag with sunny periods and flurries, FL falling to 1500m, winds abating to moderate values from the South.

Tonight: 8cm, FL lowering to valley bottom.

Thursday: Flurries

Friday: 15cm of new snow.

Snowpack Summary

Continued warm wet conditions at Rogers Pass, with 10 more mm of rain down low and 10-15cm of new snow up high, accompanied by strong Southerly winds. The Nov 5th Crust complex is now buried 40-70cm depending on elevation, and has been most reactive so far at Treeline. Nov 5th crust exists on all aspects up to 2500m, and higher on steep solar asp.

Avalanche Summary

No new avalanches were observed yesterday in the Highway Corridor, or reported from the backcountry. Last weekend we had a skier accidental with a full burial up Connaught Creek, where the storm slab was initiated on the Nov 5th crust. If you observe an avalanche or notable conditions, consider sharing on the AvCan MIN site.

Confidence

Due to the number of field observations

Avalanche Problems

Persistent Slabs

In the Alpine continued snowfall, moderate temps, and strong wind has increased slab properties above the Nov 5th crust. While at Treeline rain continues to influence the upper snowpack, making for possible moist "spring like" avalanche conditions.

  • 1011
  • New storm slabs may step down to deeper layers resulting in large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5

Storm Slabs

Recent new snow, warm temperatures, high humidity and strong wind has created storm slabs in the Alpine.

  • If triggered the storm slabs may step down to deeper layers resulting in large avalanches.
  • Convex features and steep unsupported slopes will be most prone to triggering.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1.5 - 2.5