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”
December 15, 2007 7:30 am
Good morning, this is Evelyn Lees with the
It’s another frosty morning in the mountains, with temperatures in the single digits to just below zero. The northwesterly winds are generally less than 10 mph, except along the higher ridges, where some stations are reporting average speeds of 20 mph. Turning and riding conditions have improved throughout the week, with a now supportable base beneath a silky mix of low density snow and recrystalized powder. Low angle slopes are fast and fun; the crusted, southerly facing slopes are the exception.
There were two more
human triggered avalanches yesterday in
There have been over 18 unintentionally triggered slides since the start of the month, all on upper elevation northwest, north, and northeasterly facing slopes, and all failing on facets near the ground. The pattern is clear…the weak facets are not strengthening, and you need to stay off these steep, shady slopes to avoid triggering a deep slide. Being caught in any avalanche will have serious consequences, with the potential for a dangerous ride through rocks and trees and a complete burial. Two avalanche cycles on northerly facing slopes this month are creating confusion, because some northerly facing slopes that have slid are now stable and getting tracked. But it is getting very hard to distinguish the places where avalanches have run because of various wind episodes. So instead, head to one of the numerous slopes with a low avalanche danger which have excellent riding and turning conditions
Sluffing of the weakening surface snow on steep slopes and a few isolated wind drifts along the higher ridges round out the avalanche concerns for today. These avalanches would be much smaller, but could still knock you off your feet and take you for an awful ride in the wrong place. The wind drifts may become more widespread and deeper if upper elevation wind speeds increase today.
avalanche danger is MODERATE on steep
northwest, north and northeasterly facing slopes above about 9,000’ in the
A broad ridge of high pressure
will be over the area for the next few days, with weak storms passing mainly to
the north. This will bring partly to mostly
cloudy skies to the northern mountains, with a few snow flurries possible. Temperatures will start to warm slightly, reaching
the upper teens by the end of the day.
Winds will be from the northwest, generally in the 10 to 20 mph range,
with gusts to 25. The weather mid to
late next week is looking much more interesting, with a couple storms possible.
Wasatch Powderbird guides will be flying recognizance without clients this
afternoon in American Fork, White Pine,
For an avalanche education class list, click HERE.
If you want to get this avalanche advisory e-mailed to you daily click HERE.
The UAC has temporary job openings for doing avalanche outreach in more rural areas. Click HERE for info.
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 our classic text advisory click HERE.
If you’re getting out and see anything we should know about please let us know. You can leave a message 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.
Drew Hardesty will update this advisory by 7:30 Sunday morning.