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Avalanche Forecast

Archived

Jan 30th, 2015–Jan 31st, 2015

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

Regions

Mt Hood.

A low danger is expected on Saturday. Watch for terrain hazards due to the low snowpack.

Detailed Forecast

An upper ridge will weaken slightly, but remain over the region Saturday. This will cause light winds, sunny weather and mild temperatures. High clouds should move in during the day a weak frontal system approaches.

This weather will cause little change in snow conditions and the low snowpack will cause an overall low danger. The only limited avalanche problem to watch for should be loose wet avalanches above treeline. But the likelihood and size will be listed as unlikely and small respectively

Snowpack Discussion

Last weekend a warm front caused high snow levels and rain. NWAC sites at Mt Hood had about .5-1.5 inches of rain. Mainly mild or sunny weather has been seen so far this week.

Over last weekend, during the warm rainy weather, the Meadows pro-patrol reported a saturated upper snowpack but little in the way of avalanches.

The Meadows pro-patrol continues to report a strong surface crust and melt form layers in the upper snow pack this week.

Overall the snow pack at Mt Hood should also predominately consist of stable consolidated rounded grains or melt form layers and crusts from warm periods so far this winter.

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.