Mt Hood

Issued: 8:10 PM PST Tuesday, February 6, 2018
by Robert Hahn

It will be possible to trigger a loose wet avalanche during solar heating on Wednesday. Avoid steeper solar slopes if wet surface snow becomes deeper during the afternoon hours and don't expose yourself to cliffs or terrain traps such as gulleys.

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Avalanche Problems for Wednesday

Loose Weti

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Forecast for Wednesday:

Continued very warm and warming temperatures along with partly cloudy skies will increase the possibility of loose wet avalanches on Wednesday.

The thick 10-12" crusts formed on Monday (1/5) will take time to melt, but as freezing levels continue to rise and the sun adds energy to further melt the snow, expect boot penetration to increase and enough wet snow will thaw to make triggering a loose wet avalanche possible. At all elevations, avoid steeper solar slopes where wet, slushy snow becomes deeper than a few inches.

Avalanche Summary:

Warming aloft created inversion conditions on Tuesday, but all elevations warmed above freezing by afternoon, allowing previously firm crusts an initial opportunity to thaw. Low clouds were seen near the top of the inversion.

Cooling from Sunday afternoon through Monday refroze the top 10-12" of wet surface snow into a firm crust.

Moderate to strong W-NW winds were seen over the weekend at Mt. Hood, but due to continued mild conditions, there is no snow available for transport in the above treeline band (NWAC's forecast does not apply above 7000-8000 feet). The mild and at times wet weather created wet snow conditions well into the above treeline terrain in the Mt Hood area. 

The upper snowpack consist of a mix a thick crust at the surface, wet snow, old crusts, and well consolidated storm snow. 


Mt. Hood Meadows pro patrol reported that wind kept the snow firm except at the lowest elevations receiving solar heating. Runnels were in the terrain up to 7300'.

Mt. Hood Meadows pro patrol reported that Friday's widespread wet loose avalanche activity had become more stubborn and isolated near and below treeline by Saturday.  The wet upper snowpack was still quite unconsolidated with the most recent 1/18 crust breaking down due to the sustained mild wet weather. Winds were strong near and above treeline but no snow was available for transport in area. 

No Corresponding Mountain Weather Forecast Available