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Avalanche Forecast

Archived

Apr 23rd, 2019–Apr 24th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Lizard-Flathead.

Warm overnight temperatures and sun in the forecast should allow for a quick ramp up to heightened loose wet avalanche conditions on Tuesday. Check out our 'All Melt No Freeze' spring scenario for advice on managing these conditions.

Confidence

Low - Due to the number of field observations

Weather Forecast

Tuesday night: Cloudy with clear periods and a chance of isolated flurries bringing a trace to 5 cm of new snow. Light west winds. Freezing levels dropping from 2500 to 2000 metres.

Wednesday: Mainly sunny with cloud decreasing over the day. Light west winds. Alpine high temperatures around +1 with freezing levels to 2500 metres, dropping to 1600 metres overnight.

Thursday: Mainly sunny. Light southwest winds. Alpine high temperatures around +3 with freezing levels to 2500 metres, dropping to 2000 metres overnight.

Friday: Increasingly cloudy with flurries beginning early in the day and continuing overnight. Up to 5 cm of new snow accumulating by end of day. Light southwest winds. Alpine high temperatures around -5 with freezing levels dropping to 1700 metres during the day and 1400 metres overnight.

Avalanche Summary

No new avalanches have been reported in the region. After several consecutive nights of weak overnight cooling, we can expect loose wet avalanche activity to increase rapidly during any periods of strong sunshine.

Please submit your observations to the Mountain Information Network.

Snowpack Summary

In most places rain from Saturday has likely made the surface snow moist or wet except for the highest elevation alpine. If there has been a good overnight freeze, there may be a supportive crust on the surface. The mid and lower snowpack pack are likely a mixture of moist snow and crusts. Below treeline the snowpack has melted or is isothermal.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.