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| Advisory: Logan Area Mountains | Issued by Toby Weed for Tuesday - December 23, 2014 - 7:19am |
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bottom line There's a CONSIDERABLE (level 3) avalanche danger and dangerous avalanche conditions exist on many slopes. Natural avalanches are possible and you are likely to trigger avalanches on steep slopes above about 8000'. Avalanche accidents are common on nice days right after a storm. Avoid and stay out from underneath slopes steeper than about 30 degrees.
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current conditions The Tony Grove Snotel reports an inch of new and 56 inches of total snow containing 134% of average water for the date. It's 21 degrees this morning at the well-representing 8400' site. There's close to two feet of heavy snow containing almost 5" of water from the weekend storm plastered into terrain at upper elevations. The UDOT Hwy 89 Logan Summit weather station is reading 17 degrees and less than 10 mph northwest winds. Dangerous avalanche conditions persist, and a Christmas storm will create increasing avalanche danger in the backcountry yet again.
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recent activity There were numerous natural and human triggered avalanches in the backcountry across the mountains of Northern Utah since the wet storm over the weekend. In the Logan Zone, several large naturals on the east wall of the Wellsville Range could be seen from Cache Valley with better visibility yesterday. The avalanches filled in the brushy gullies, running up to a couple thousand vertical feet down the monster avalanche paths in the Wellsville Mountain Wilderness. Visit our Backcountry Observations Page for more information.....
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| type | aspect/elevation | characteristics |
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LIKELIHOOD
 LIKELY
UNLIKELY
SIZE
 LARGE
SMALL
TREND
 INCREASING DANGER
SAME
DECREASING DANGER
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description
Heavy and blown snow has overloaded the very weak layer of faceted snow and fluffy new that was on the snow surface before the storm arrived. You can expect remote trigger potential especially on slopes that face the north half of the compass. As usual, the worst problems will be on slopes with recent wind deposits. Avalanches may break 2 feet deep with a very hefty slab that will likely be more destructive than normal.
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weather I'll be mostly sunny in the mountains, with a high temperature at 8500' around 24 degrees and fairly light northwest winds. Clouds will increase tomorrow in advance of a strong and cold Pacific Storm, which will bring snow down to the valley floors and significant accumulations to the mountains on Christmas and Boxing Days. Check out our one-stop weather page........HERE
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| general announcements You can now receive advisories by email for each region in the state including Logan. Go here for details. Get your advisory on your iPhone along with great navigation and rescue tools....... Utah Avalanche Center mobile app Please submit snow and avalanche observations from your ventures in the backcountry HERE. You can call us at 801-524-5304 or email HERE, or include #utavy in your Instagram or Tweet us @UAClogan. To report avalanche activity in the Logan Area or to contact the local avalanche forecaster call me, Toby, at 435-757-7578. I'll regularly update this advisory on Monday, Wednesday, Friday, and Saturday mornings by about 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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