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Archived

Avalanche Forecast

Apr 18th, 2022–Apr 21st, 2022
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: Waterton Lakes.

After a glorious week of calm in Waterton the wind is back with a vengeance Tuesday night. Watch for wind slabs in alpine lees where snow is available for transport.

We are back to spring weather. Watch for signs of instability as temp rise each day.

Weather Forecast

Tonight: Wet flurries, amounting 5 cm. Extreme SW winds.

Tues: Mix of sun and cloud with isolated flurries. ALP high -3. Moderate gusting extreme W winds. FL 1600m.

Wed: Mix of sun and cloud with isolated flurries. ALP high -4. Light gusting strong W winds. FL 1800m.

Thur: Cloudy with isolated wet flurries. ALP high of 0. Light SW winds. FL 2100m

Snowpack Summary

25-30 cm snow overlies april rain crust on all elevations, all aspects. Snow surface became wet to 2000m on Monday. Well consolidated mid and lower snowpack. HS 250-300 cm near the continental divide.

Avalanche Summary

Few wet loose avalanches to size 1.5 with high freezing levels Monday. No new avalanches reported on Saturday. Please report any observations to the Mountain Information Network we really appreciate the information as neighboring operations are shutting down for the season.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Avalanche Problems

Wind Slabs

Return of the wind bring return of the wind slab. There is 25 -30cm of snow available for transport in the alpine. Use caution in lees especially at ridge top and in the alpine.

  • Use caution in lee areas. Recent wind loading have created wind slabs.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Wet

Watch for pin wheeling and snow becoming moist with day time heating. Exercise caution in steep slopes, confined areas and terrain traps where small avalanches are high consequence.

  • Use extra caution on slopes if the snow is moist or wet.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5

Cornices

Cornices will weaken with day time heating. Pay attention to over head hazard and minimize time below cornices.

  • Stay well back from cornices.
  • Give cornices a wide berth when travelling on or below ridges.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely

Expected Size: 1 - 2