Lawinenlagebericht

Crowsnest North

Mar 18 – 19, 2023Avalanche Canada
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Lawinengefahr

Mon
Tue
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
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Kernpunkte

Use caution in wind loaded areas. Minimize your exposure to steep slopes facing the sun during the hottest part of the day.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2.5

    Recent southwest winds have built wind slabs in alpine and treeline lees.

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1.5–2.5

    The full impact of the march sun is slowly weakening cornices. Pay attention to cornices and give them a wide berth when traveling on or below ridges.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2

    Steep, rocky terrain facing the sun is likely to see thin loose wet avalanches release during the heat of the day.

Confidence

High

Avalanche Summary

Avalanche activity in the latter part of the week has been limited to size 1 wet loose avalanches from steep rocky slopes facing the sun.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

20 of storm snow falling earlier in the week has been redistributed by southwest winds at alpine and treeline into lee terrain. Storm snow tapers to a rain crust below 1700 m. Solar aspects at treeline and below are coved in a refrozen melt-freeze crust.

A melt-freeze crust with facets above can be found 50 to 120 cm deep. It has not produced any recent avalanche activity in the region, however, professionals are still tracking it to watch for signs of it becoming an active problem.

The mid to lower snowpack is well-bonded. Currently, we are not seeing the same basal weak layers and reactivity that many of the neighboring regions are experiencing this season.

Weather Summary

Saturday Night

Mainly clear with a few clouds. Treeline temperature -4 °C. Wind moderate west easing to light. Freezing levels drop to valley bottom.

Sunday

Mainly sunny with clouds increasing in the afternoon. Treeline temperature 0 °C. Wind light southwest. Freezing level rising to 2100m.

Monday

Mainly cloudy. Treeline temperature -5 °C. Wind strong east. Freezing level 1500m.

Tuesday

Mix of sun and cloud. Treeline temperature -7 °C. Wind light east. Freezing level 1300m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Be alert to conditions that change with elevation and sun exposure.
  • Avoid exposure to sunny slopes, especially in the afternoon.
  • Avoid exposure to slopes that have cornices overhead.

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