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Avalanche Canada jsmith, Avalanche Canada

Kootenay Boundary Avalanche Forecast

Apr 26th, 2019 3:32PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is moderate. Known problems include Wind Slabs and Loose Wet.

Last Avalanche Forecast for the season. For additional information check out our Spring Conditions page at: https://goo.gl/cpx8Dq

New snow and moderate winds from a variety of directions may form small wind slabs reactive to human triggers.

Summary

Confidence

Low - Forecast snowfall amounts are uncertain

Weather Forecast

FRIDAY NIGHT: Partly cloudy / Strong, westerly winds / Alpine low -3 C / Freezing level 1500 m.

SATURDAY: Snow; 5-10 cm. / Moderate, westerly winds / Alpine high -1 C / Freezing level 1500 m.

SUNDAY: Mix of sun and cloud / Light, northeasterly winds / Alpine high 0 C / Freezing level 1500 m.

MONDAY: Mix of sun and cloud / Light, northwesterly winds / Alpine high 0 C / Freezing level 1500 m.

Avalanche Summary

No new avalanches were reported in this region on Thursday. However, there are currently no professional observers submitting daily observations. Please submit your observations to the MIN. Photos of avalanches or current conditions are particularly useful.

Snowpack Summary

As temperatures cool, we will enter a diurnal cycle during which the hazard will be low in the mornings, if there was a strong overnight freeze, and elevate throughout the day depending on warming and solar radiation. Hazard ratings are for the peak hazard expected during each day.

Check out this link for useful advice on managing avalanche hazard during spring conditions. HERE.

Problems

Wind Slabs

An icon showing Wind Slabs

Likelihood

Likely - Possible

Expected Size

1 - 1.5

New snow and moderate winds from a variety of directions may form small wind slabs reactive to human triggers.

  • Pay attention to changing conditions with elevation/aspect.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Use small slopes without consequence to test the bond of the new snow.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Loose Wet

An icon showing Loose Wet

Likelihood

Possible

Expected Size

1 - 1.5

Any appearance of the strong April sun can initiate a loose wet avalanche cycle. The likelihood of loose wet avalanches increases as temperatures warm through the day and/or if the sun comes out for a prolonged period of time.

  • Avoid exposure to terrain traps where the consequences of a small avalanche could be serious.
  • A moist/wet snow surface, pinwheeling and natural avalanches all indicate a weakening snowpack.

Aspects:

All aspects.

Elevations:

Alpine, Treeline.

Valid until: Apr 27th, 2019 2:00PM