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
keeping you on top
February 16, 2007 7:30 am
Good morning, this is Evelyn Lees with the
The Banff Mountain Film Festival will be held at Kingsbury Hall next Tuesday and Wednesday, February 20 & 21st. Tickets are $7.50 per show and available at Kingsbury Hall, Art-Tix, the Salt Lake and Sandy REI stores, and the Outdoor Recreation Program at the U of U. Shows start at 7pm each night. (CLICK FOR DETAILS)
Snow is falling at
most mountain stations this morning, with overnight snow totals in the 3 to 6
range. 24 hour snow totals are 2 to 10,
with water equivalents of Ό of an inch to almost 1 ½ inches of water. The heaviest snowfall has been in parts of
Recent Avalanche Activity:
Yesterday, there were many more reports of widespread collapsing throughout the range. Sensitive, small wind drifts were triggered up to 8' long by 2' deep. One soft slab was released on facets (Photo), 18" deep by 40' wide, on a north facing slope at 9,700 with a ski cut. Snow pits continue to show easy failure on the buried facets and around a sun crust that formed Tuesday on southeasterly facing slopes.
Snow and Avalanche Discussion:
The first avalanche problem today is the fresh, dense wind drifts formed by the strong, northwesterly winds that have been blowing overnight. These drifts will be most common along the ridgelines on east and southeasterly facing slopes, but due to the strong wind speeds, snow will also be drifted well off ridgelines. Watch for cross loading around terrain features such as rocks and rollovers at mid and low elevations. The dense, warm drifts may be stubborn, but could then break out wide once they get moving. Any new wind drifts triggered could easily step down into old snow.
The second avalanche problem is the new snow is once again overloading the deeper, weak faceted layers. Slides failing on these facets will take out two storms worth of snow, and avalanche depths could be 1 to 3 deep and pull out wider than expected onto low angle adjacent slopes. Slopes that slid last cycle could repeat. Slides can be triggered from a distance and natural avalanches are possible today, so avoid travel below and adjacent to steep slopes.
Bottom Line for the
The avalanche danger is
on any slope steeper than about 35 degrees, especially with recent drifts of
wind blown snow. CONSIDERABLE means human
triggered slides are probable and natural avalanches possible. Pockets
danger exist in areas that received the most snow and wind, including the upper
elevations of Little Cottonwood and the
A strong, moist northwest flow will remain over the area through this afternoon. Light snow will continue this morning, before tapering later today. The strong northwesterly winds will persist all day, with ridgeline averages in the 25 to 35 mph range, and gusts to near 50. Speeds will be greater along the most exposed ridges. Temperatures will remain near freezing at 8,000 and near 20 at 10,000. Winds will decrease tonight as high pressure builds in for the weekend.
Yesterday, the Wasatch Powderbird Guides did not fly, and today they most
likely be shut down for wind and snow, but if possible, they will be in American
Fork, Cardiff, Days, Silver and Grizzly.
With questions regarding their areas of operation call 742-2800.
Listen to the advisory. Try our new streaming audio or podcasts
UDOT highway avalanche control work info can be found HERE or by calling (801) 975-4838.
Our statewide tollfree line is 1-888-999-4019 (early morning, option 8).
For a list of avalanche classes, click HERE
For our classic text advisory click HERE.
To sign up for automated e-mails of our graphical advisory click HERE
We appreciate all the great snowpack and avalanche observations weve been getting, so keep leaving us messages at (801) 524-5304 or 1-800-662-4140, or email us at [email protected]. (Fax 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.
Brett Kobernik will update this advisory by 7:30 on Saturday morning, and thanks for calling.