Utah Avalanche Center
New member
December 21, 2005 - 6:53 am This is our new graphical advisory format. You can update your bookmarks to this link:http://www.avalanche.org/~uac/newadvisory/advisory.phpWe will publish both this text-based advisory as well as the new graphical version so you can choose which one you prefer. Let us know about any formatting problems. Click on the danger rose for a turtorial.
Bottom Line:Theres a MODERATE danger today of lingering slabs on persistent layers of faceted snow on northwest, north, northeast and east facing slopes above 8,500 steeper than 35 degrees, especially in thin snowpack areas. There is also a MODERATE danger of wet sluffs and wet slabs at elevations below about 8,500 when the snow gets wet and sloppy.
Links: Avalanche List Photos Profile List Weather Links Glossary 24 Hrs Lingering slabs still exist on upper elevation steep slopes, especially on the buried layer of weak faceted snow on the northerly through easterly facing slopes. These avalanches will be difficult to trigger, but they will be large and dangerous. They will break 1-3 feet deep and the stiff slab above the weak layer will feel solid and stiff until the whole slope lets go. Fractures will likely break up above you. 24 Hrs Very warm temperatures will continue today, which will produce localized wet sluffs and occasional wet slabs at lower elevation slopes that are getting wet and sloppy. Be sure to get off of and out from underneath steep slopes when they get soggy. Clues to instability include rollerballs and point-release sluffs. There wasnt a lot of avalanche activity yesterday as the slab was stiff and stubborn. As one friend of mine told me yesterday, Theyre hard to trigger, but if you do, you will feel like Jimmy Hoffaencased in concrete. One person kicked a cornice on southeast facing ridge of Renolds Peak in Big Cottonwood Canyon and triggered a 1.5 foot deep, 75 wide slab in the new snow. Photo There was also a natural avalanche in the main bowl. A natural avalanche occurred yesterday morning on Pioneer Ridge near the Park City Resort of about the same dimensions on faceted snow, and a natural that occurred during the storm on a southeast facing slope in Willows Photo 1, Photo 2, Photo 3, Photo 4. Most of these were running on the density inversion within the new snow, but occasionally on the weak faceted snow formed during the clear spell. Clear skies overnight have likely made most of these avalanche problems settle out, but theres still a couple things you will need to pay attention to today: We could solve all our energy needs this winter if we could just harness all the hot air expended on cursing the snow conditions these past couple days. One of our most experienced observers described it as the most super-heinous conditions I have ever experienced. Another person described the snow as 5-minute epoxy. The very warm temperatures and wind have made the snow very up side down with a dense, stiff slab on top of the cold, dry snow from Sunday. I wish my stock portfolio looked like the graph of ridge top temperatures these past three daysup, up, up. They will likely peg out around 37 degrees today and much warmer at lower elevations. The snow conditions seem worst on the west side of the Wasatch Range and better on the Park City side and in the Uinta Mountains. Today we have a ridge building over us and the ridge top temperatures will spike up to a very toasty 37 degrees by mid day. Down at 8,000 they should rise to 45 degrees. Skies should be mostly sunny this morning, but we should have increasing clouds this afternoon. Ridge top winds will blow 15-20 from the northwest, switching to the southwest by afternoon. We have one last shot of snow for Thursday and Friday with cooler temperatures and 6 inches to a foot of new snow. After that, we have sunny, warm weather for the holiday weekend through about Tuesday. For those of you old enough to remember, Sue Ferguson was the director of the Utah Avalanche Forecast Center before I took over in 1986. She lost a long battle with breast cancer two days ago. Sue was an amazingly intelligent and talented woman who also started The Avalanche Review. We will miss her.Craig Gordon will give a free avalanche class tonight at the Fire Station in Wanship at 7pm.The beacon locator park at Snowbird is now open and free to the public. Its sponsored by Wasatch Backcountry Rescue and Snowbird and located just off the bypass road in upper Little Cottonwood Canyon.
Yesterday, Wasatch Powderbird Guides didnt get out due to weather and today, theyll be in Cardiff, Days, Silver and American Fork with an avalanche class in Grizzly Gulch. For more info, call 742-2800.
This advisory provided by the Wasatch Cache National Forest, in partnership with:
Utah Division of State Parks and Recreation, The Friends of the Utah Avalanche Center, Utah Department of Emergency Services and Homeland Security and Salt Lake County
DISCLAIMER: Above is information on each factor affecting todays' danger rating. All factors must be considered to develop a backcountry travel plan that will reduce your risk.
The post was created using an automated process maintained by First Tracks! Online.
Bottom Line:Theres a MODERATE danger today of lingering slabs on persistent layers of faceted snow on northwest, north, northeast and east facing slopes above 8,500 steeper than 35 degrees, especially in thin snowpack areas. There is also a MODERATE danger of wet sluffs and wet slabs at elevations below about 8,500 when the snow gets wet and sloppy.
Links: Avalanche List Photos Profile List Weather Links Glossary 24 Hrs Lingering slabs still exist on upper elevation steep slopes, especially on the buried layer of weak faceted snow on the northerly through easterly facing slopes. These avalanches will be difficult to trigger, but they will be large and dangerous. They will break 1-3 feet deep and the stiff slab above the weak layer will feel solid and stiff until the whole slope lets go. Fractures will likely break up above you. 24 Hrs Very warm temperatures will continue today, which will produce localized wet sluffs and occasional wet slabs at lower elevation slopes that are getting wet and sloppy. Be sure to get off of and out from underneath steep slopes when they get soggy. Clues to instability include rollerballs and point-release sluffs. There wasnt a lot of avalanche activity yesterday as the slab was stiff and stubborn. As one friend of mine told me yesterday, Theyre hard to trigger, but if you do, you will feel like Jimmy Hoffaencased in concrete. One person kicked a cornice on southeast facing ridge of Renolds Peak in Big Cottonwood Canyon and triggered a 1.5 foot deep, 75 wide slab in the new snow. Photo There was also a natural avalanche in the main bowl. A natural avalanche occurred yesterday morning on Pioneer Ridge near the Park City Resort of about the same dimensions on faceted snow, and a natural that occurred during the storm on a southeast facing slope in Willows Photo 1, Photo 2, Photo 3, Photo 4. Most of these were running on the density inversion within the new snow, but occasionally on the weak faceted snow formed during the clear spell. Clear skies overnight have likely made most of these avalanche problems settle out, but theres still a couple things you will need to pay attention to today: We could solve all our energy needs this winter if we could just harness all the hot air expended on cursing the snow conditions these past couple days. One of our most experienced observers described it as the most super-heinous conditions I have ever experienced. Another person described the snow as 5-minute epoxy. The very warm temperatures and wind have made the snow very up side down with a dense, stiff slab on top of the cold, dry snow from Sunday. I wish my stock portfolio looked like the graph of ridge top temperatures these past three daysup, up, up. They will likely peg out around 37 degrees today and much warmer at lower elevations. The snow conditions seem worst on the west side of the Wasatch Range and better on the Park City side and in the Uinta Mountains. Today we have a ridge building over us and the ridge top temperatures will spike up to a very toasty 37 degrees by mid day. Down at 8,000 they should rise to 45 degrees. Skies should be mostly sunny this morning, but we should have increasing clouds this afternoon. Ridge top winds will blow 15-20 from the northwest, switching to the southwest by afternoon. We have one last shot of snow for Thursday and Friday with cooler temperatures and 6 inches to a foot of new snow. After that, we have sunny, warm weather for the holiday weekend through about Tuesday. For those of you old enough to remember, Sue Ferguson was the director of the Utah Avalanche Forecast Center before I took over in 1986. She lost a long battle with breast cancer two days ago. Sue was an amazingly intelligent and talented woman who also started The Avalanche Review. We will miss her.Craig Gordon will give a free avalanche class tonight at the Fire Station in Wanship at 7pm.The beacon locator park at Snowbird is now open and free to the public. Its sponsored by Wasatch Backcountry Rescue and Snowbird and located just off the bypass road in upper Little Cottonwood Canyon.
Yesterday, Wasatch Powderbird Guides didnt get out due to weather and today, theyll be in Cardiff, Days, Silver and American Fork with an avalanche class in Grizzly Gulch. For more info, call 742-2800.
This advisory provided by the Wasatch Cache National Forest, in partnership with:
Utah Division of State Parks and Recreation, The Friends of the Utah Avalanche Center, Utah Department of Emergency Services and Homeland Security and Salt Lake County
DISCLAIMER: Above is information on each factor affecting todays' danger rating. All factors must be considered to develop a backcountry travel plan that will reduce your risk.
The post was created using an automated process maintained by First Tracks! Online.