Wasatch Cache National Forest

In partnership with: The Friends of the Utah Avalanche Center, Utah Department of Public Safety Division of Comprehensive Emergency Management,

Salt Lake County, and Utah State Parks:

 

To have this advisory automatically e-mailed to you each day free of charge, visit: http://www.mailermailer.com/x?oid=16351h.         

For photos of avalanches and avalanche phenomenon, visit:  http://www.avalanche.org/%7Euac/photos_03-04.htm      (Updated 2/12)

Photos sent in by observers throughout the season visit:  http://www.avalanche.org/~uac/obphotos/observer.html.      (Updated 2/12)

For a list of backcountry avalanche activity, visit:  http://www.avalanche.org/%7Euac/Avalanche_List.htm.     (Updated 2/12)

 

Avalanche advisory

Wednesday, February 18, 2004,   7:30 am

 

Good morning, this is Andrew McLean with the Forest Service Utah Avalanche Center with your backcountry avalanche and mountain weather advisory.  Today is Wednesday, February 18, 2004, and it’s 7:30 a.m.  This forecast is brought to you in partnership with the Friends of the Utah Avalanche Center, supported by the Uinta Brewing Company.

 

As of yesterday afternoon, American Fork Canyon will be closed indefinitely due to wet avalanche activity. 

 

Current Conditions:

Over the last 30 hours, our snowpack has been impersonating the Wicked Witch of the West, who screamed “I’m melting!”  With temperatures in the mid to high 40’s yesterday at 8,000’, we’ve lost 2 - 3 inches of depth on an average and made up for it in places with a trace to 1” of new.  A wind advisory has been issued for today with gusts of 60+ mph expected on the ridgelines under overcast skies.  For turning and riding conditions, you’ll be wishing there was “no place like home”, with plenty of gloppy, crusty snow in the Wasatch mountains.

 

Avalanche Conditions:

Wet slide activity will be the major concern today with the mid to lower elevations seeing the most action.  These wet slides can range from small point release sluffs all the way up to major avalanches.  Yesterday, numerous slides hit the American Fork Canyon road, with the biggest one crossing both lanes and resulting in a six feet deep debris pile.   Little Cottonwood Canyon also saw quite a bit of activity, with steep, lower elevation slopes such as the Y-Couloir and the Coalpit slide paths running naturally.   While some of these paths may have cleared themselves out, with today’s continuing warm temperatures and high clouds contributing a temperature greenhouse effect, the activity will most likely shift to the mid elevations. Avalanches will be easy to trigger with slope cuts, but could also naturally release above you from snow dropping off of tree branches or peeling off of rocks.  You’ll want to keep an eye and ear out for any ominous rumbling noises coming down from above you.  Slope angle will be a key element in today’s activity, so break out your clinometers and keep your angles below 35 degrees.

 

Ice climbers will want to be especially careful today and lower elevation backcountry travelers should avoid loitering in terrain traps.  Areas with slick, underlying bedrock, such as the quartzite regions of Big Cottonwood Canyon will be prime candidates for glide releases as the warm weather continues.

 

Bottom Line for the Wasatch Range, including the Salt Lake, Park City, provo and OGden AREA MOUNTAINS:

On mid elevation slopes steeper than 35 degrees, there is a moderate danger, with human triggered wet slides being possible.  During the heat of the day, the danger will rise to considerable, with natural avalanches being possible.  There will be a low danger of human triggered avalanches on slopes less steep than 30 degrees.

 

Uinta Mountains:  For Uinta specific information, click on Western Uintas on the advisory page or phone 1-800-648-7433.

Logan: click HERE or call 435-797-4146

 

Mountain Weather:

Starting around midnight last night, the temperatures climbed above freezing in the mountains and will continue this trend until they reach a high in the upper 40’s today.  Strong, gusty winds of up to 60mph out of the southwest are expected along the ridgelines, along with a chance of rain.  These winds will start to decrease in the mid afternoon as the temperatures start to drop in advance of a cold front.  Overnight temperatures will drift down into the low 20’s and 2 – 4 inches of snow is expected with moderate winds out of the NW.  Mixed overcast weather will continue through the weekend, with possible daily snow accumulations of 2 – 4” expected.

 

For specific digital forecasts for the Salt Lake, Provo or Ogden mountains, CLICK HERE.

 

General Information:

The Wasatch Powderbird Guides were grounded yesterday and will mostly likely be grounded again today.  If not, they will be flying in Mineral, Days, Silver and White Pine.

 

If you are getting into the backcountry, please give us a call and let us know what you’re seeing, especially if you trigger an avalanche.  You can leave a message at 524-5304 or 1-800-662-4140.  Or you can e-mail an observation to uac@avalanche .org, or you can fax an observation 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. 

 

Bruce Tremper will update this advisory Thursday morning.

Thanks for calling.

 

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