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Advisory: Logan Area Mountains | Issued by Toby Weed for January 12, 2013 - 7:14am |
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![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
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bottom line There is a MODERATE (or level 2) danger in the backcountry today. Heightened avalanche conditions exist in drifted terrain, and you could trigger wind slab avalanches on steep slopes. Generally manageable soft slabs and sluffs involving the fresh powder are likely on steep lower and mid elevation slopes with significant deposits of new snow. Evaluate the snow and terrain carefully, avoid steep drifted slopes and terrain traps below, and continue to practice safe travel protocols...
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special announcement The friends of the Utah Avalanche Center in Logan is presenting a snowmobile avalanche safety clinic in Logan, with a classroom session on Thursday.January 17 and a field session up at Tony Grove on Saturday January 19. Save the date, call 435-757-2794 for more information, and visit our website to register..... HERE |
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current conditions The light new snow won't be enough to change the avalanche danger much in most areas, but wind slabs are starting to overload weak existing snow structure in drifted terrain that received more snow. The light powder improved riding conditions, but in most places you can still feel and hear Tuesday's rain/rime-crust, which is widespread across the region. The crust is quite variable in thickness and plagues slopes at all elevations. The Tony Grove Snotel at 8400' reports 6 inches of new snow and 3/10ths of an inch of water in the past 24 hours. It's 3 degrees below zero this morning, there is 49 inches of total snow, and the station reports 73% of average water content for the date. The CSI Logan Peak weather station at 9700' reports 8 degrees below zero, and light west winds, with speeds averaging in the lower single digits...
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recent activity No avalanches were reported locally, but my party triggered a couple small wind slabs on a drifted mid elevation slope as well as a few telling audible collapses. Resorts in the Ogden Valley ( with significantly more accumulation) report active soft slab conditions yesterday and a few naturals overnight. A party unintentionally triggered a good sized avalanche that broke through a rime crust on a mid elevation slope in the mountains above Salt lake City yesterday. Here's a link to our avalanche list...
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type | aspect/elevation | characteristics |
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![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
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description
Watch out for fresh wind slabs on the lee side of major ridges and in and around terrain features like cliff bands, sub-ridges, gullies, and scoops. Fresh wind slabs could be around a foot deep and could be deeper in places. Drifts formed on weak sugary faceted surface snow, in many areas capped by a rain or rime crust from Tuesday. Soft wind slabs will be deeper and wider in areas that picked up more snow like in the southern part of the zone and at mid and lower elevations. Avoid wind drifts on steep slopes, which often appear smooth or rounded and chalky looking, and they sometimes sound rather hollow. Cracking and audible collapsing in drifted snow are red flags requiring reevaluation of your route...
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type | aspect/elevation | characteristics |
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![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Above 8,500 ft.
7,000-8,500 ft.
5,000-7,000 ft.
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description
Soft storm snow slabs and potentially long running dry sluffs are likely on steep slopes at mid and lower elevations in areas that received significant accumulations of light new snow... Use extra caution and safe travel protocols in lower elevation terrain with lots of new snow, and avoid potential terrain traps like gullies and cut-banks below steep slopes... ..
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weather Expect cold temperatures in the mountains today, with high temperatures at 8500' approaching 5 degrees. It'll be mostly cloudy, with a little snowfall possible and fairly light west-northwest winds. Temperatures will drop well below zero again tonight and snowfall but little accumulation is expected. A very cold northwest flow will continue through the weekend and a dryer more stable weather pattern is expected next week.. Check out the new Logan Mountain Weather page...
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general annoucements Remember your information from the backcountry can save lives. If you see or trigger an avalanche in the backcountry 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. |