Avalanche Forecast Glacier National Park

Date Issued: Valid Until:

Parks Canada percy woods, Parks Canada

Avalanche Forecast

Sun Apr. 28th ยท 8:00AM

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold
Wind Slabs Wind Slabs
Loose Wet Loose Wet

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold

Alpine

Danger Ratings Below Threshold

Treeline

Danger Ratings Below Threshold

Below Treeline

Danger Ratings Below Threshold

North Easterly winds were raking the forecast area overnight. Cornices are large and looming. Minimize your exposure to these lurking giants.

Weather Forecast

Sunny with an alpine high temp of -4C. Winds are forecast to be light out of the NE with a freezing level rising to 1800m. Very much the same forecast for Monday with the chance of a trace of storm snow on Tuesday with freezing levels rising to the 1800m range during the day.

Snowpack Summary

Mod to strong NE winds have redistributed up to 10cm new snow that fell Friday night. This now sits on a melt freeze crust at treeline and below as well as solar aspects in the alpine. Isothermal snow lives below these surface crusts. Total storm snow this week now over 60cm in the high Alpine, N-NE aspects will have retained the driest snow.

Avalanche Summary

No new avalanche observations in the highway corridor.

Confidence

Problems

Wind Slabs

Wind Slabs

Mod -strong N-NE winds have reverse loaded recent storm snow onto Alpine and exposed treeline SW-S aspects. These new thin slabs will reside over old melt freeze crusts and may be sensitive to human triggering.

  • Be careful with wind loaded pockets formed by Northeasterly winds.
  • Use caution above cliffs where small avalanches may have severe consequences.

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

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 2
Loose Wet

Loose Wet

Alpine temps are forecast to remain cold today. however steeper true solar aspects may see enough spring solar radiation to start shedding surface snow in the form of point releases.

  • Watch for moist surface snow over crust on steeper solar aspects.

Aspects: South East, South, South West.

Elevations: All elevations.

Likelihood

Possible - Unlikely

Expected Size

1 - 2