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Avalanche Advisory
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Advisory: Logan Area Mountains Issued by Toby Weed for March 26, 2013 - 7:35am
Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
bottom line

Midday solar warming will create heightened avalanche conditions, a rising danger and a MODERATE (or level 2) danger of loose wet and heat related avalanches on slopes with saturated surface snow. Ridge-top cornices could naturally fall due to warming and they might break further back than expected. Evaluate the snow and terrain carefully, consider an early exit, and continue to follow safe travel protocols...




danger scale: 1. Low 2. Moderate 3. Considerable 4. High 5. Extreme
special announcement

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current conditions

The Tony Grove Snotel at 8400' reports 26 degrees, and with 63"of total snow, the station sits at 66% of average water for the date. The CSI Logan Peak weather station at 9700' reports 23 degrees and 20 mph south winds. Sun and warmth dampened the snow in sunny terrain to the mountain tops yesterday, but I'm holding out hope for a little dry snow up high on north facing slopes.

( Video Observation from 3-22-2013)

recent activity

We received reports of several triggered wind slab avalanches over the weekend in the Tony Grove and Providence Canyon areas. The shallow soft slab avalanches, involving fresh snow from last week, were fairly small and manageable, and nobody got caught... We triggered a couple small loose wet avalanches yesterday morning in the southern Wellsvilles and headed home before noon....

Here's a link to our updated Avalanche List.

Avalanche Problem 1over the next 24 hours
type aspect/elevation characteristics
Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
likelihood size
likely
unlikely
large
small
distribution trend
widespread
isolated
More Dangerous
Increasing
Less Dangerous
description

Expect a rising danger of loose wet avalanches and/or heat related activity as mountain temperatures rise well above freezing with midday warmth today. Cloud cover is likely to increase this afternoon, which could trap heat in the atmosphere. Pin wheels or roller balls are signs that the surface snow is heating up, and you should avoid travel on or under steep slopes with saturated surface snow. As always, watch for terrain traps like trees or gullies below you. It's best to plan for an early exit this time of year....

Avalanche Problem 2over the next 24 hours
type aspect/elevation characteristics
Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
likelihood size
likely
unlikely
large
small
distribution trend
widespread
isolated
More Dangerous
Increasing
Less Dangerous
description

The midday warmth will cause the recently enlarged cornices to sag and buckle, and some may naturally calve off. Cornices could break further back than expected and they might trigger avalanches on steep slopes below.

weather

Check out the Logan Mountain Weather page...

general annoucements

For a printer friendly version of this advisory click HERE

Remember your information from the backcountry can save lives. If you see or trigger an avalanche, or see anything else we should know about, please send us your snow and avalanche observations.   You can also call us at 801-524-5304 or email by clicking HERE.  In the Logan Area you can contact Toby Weed directly at 435-757-7578.

I will update this advisory on Monday, Wednesday, Friday, and Saturday mornings by around 7:30...

This advisory is produced by the U.S.D.A. Forest Service, which is solely responsible for its content. It describes only general avalanche conditions and local variations always exist. 

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