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
Wednesday, December 07, 2005 7:30am
Good morning, this is Evelyn Lees with the
UDOT has a highway avalanche control work hotline for Little Cottonwood road, which is updated as needed. 801-975-4838.
Up coming avalanche awareness talks by the UAC
Dec 7 7 pm Lady of the Snows, Alta
Dec 7 7 pm Timpanogos Regional Hospital, Orem
Dec 13 7 pm REI, 3285 E, 3300 S, SLC
Dec 14 6:60 pm Mnt High Motorsports, 8262 S Redwood Rd, West Jordan
Dec 14 7 pm South Valley Unitarian, 6876 S Highland Dr.
Yesterday’s snow producing storm coated the mid and upper elevations with 1 to 2’ of classic
Yesterday, the combination of heavy snowfall and strong winds resulted in many reports of shallow new snow slides and sluffs, some running long distances. Highway control work in Little Cottonwood Canyon resulted in 3 slides reaching the road, and a party of snowmobilers triggered a slide with a debris pile deep enough to bury a machine. (We could use more information on this slide, so please give us a call at 524-5304. Thanks!) Today, it will still be possible to trigger new snow slides and sluffs, especially in wind drifted areas, with the larger slides having enough volume to catch, carry and bury a person. But I expect the new snow to stabilize rapidly today, and new snow slides to be harder to trigger by this afternoon.
The other avalanche problem is that the new snow may have once again overloaded the weak sugary facets near the ground on some slopes. This is the same tricky pattern as last week – there are only a few places where the weight of a person or new snow slide could trigger a slide on facets, but if released, the slide will be deep and dangerous. The most likely slopes to trigger a deeper slide would be northwest through easterly facing, above about 8,500’. So once again, give the facets some time to adjust to the new load. Start your backcountry travel today on lower angle, non wind drifted slopes, and very gradually work into the steeper terrain. Any collapsing is a sign of unstable snow.
The avalanche danger is CONSIDERABLE on slopes steeper than 35 degrees with recent drifts of wind blown snow. Both soft slabs and sluffs are possible, with drifting most common on northeast through southeasterly facing slopes. On a few shady slopes, facing the north half of the compass, it may be possible for slides to break on the weak facets near the ground, resulting in a deep, dangerous slide. Other steep slopes have a MODERATE danger.
A very cold arctic air mass has settled across northern
Seasonal Weather History Charts. (NOTE: USE INTERNET EXPLORER FOR BEST VIEWING)
Please report any backcountry snow and avalanche conditions you observe. We appreciate all information. You can call (801) 524-5304 or 1-800-662-4140, or email to [email protected] or fax to 801-524-6301. The information in this advisory is from the U.S. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur.
To have this advisory automatically e-mailed to you each day, click HERE. (You must re-sign up this season even if you were on the list last season.)
The annual report for 2004-05 is now on the web. (Click HERE, 8mb)