In partnership with: The Friends of the Utah Avalanche Forecast Center, Utah Department of Public Safety Division of Comprehensive Emergency Management, Salt Lake County, and Utah State Parks
Tuesday, February 11, 2003
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HERE (Will update morning
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Good Morning. This is Bruce Tremper with the
It was a bit blustery yesterday in the upper elevation wind exposed areas with steady 30 mph winds gusting to 40 on the highest peaks with winds more like 20 mph on some of the mid elevation ridges. People are reporting some wind damage in above tree line wind exposed areas and sun crusts on south facing slopes, but still some nice powder in the wind and sun sheltered slopes. Today may be the last day for good powder because I’m expecting the ridge top temperatures to rise to 30 degrees today and 8,000’ temperatures to get up to around 40 this afternoon.
Today is the first day in nearly
two weeks that we have not heard about a significant avalanche breaking into
deeper layers of weak, faceted snow. I doubt if none occurred, but it’s just that
fewer people were out yesterday and I haven’t heard about them. I did, however, hear about a couple of people
who were able to intentionally trigger wind slabs deposited by the strong winds
yesterday. On person was kicking
cornices along the ridge line in
Also, some of these wind slabs could easily overload the deeper layers of weak faceted snow that were formed during the dry spell in January, now buried about two feet deep. Almost all of the avalanches we have had for the past two weeks have been breaking on this layer.
Although there’s only localized places where you can trigger these deeper avalanches, they will be large and very scary. (If you need any convincing, you can check out the extensive photo gallery on the web at the usual site (www.avalanche.org/~uac/photos_02-03.htm). And look at the current list of avalanches at: www.avalanche.org/~uac/Avalanche_List.htm)
Finally, today at lower elevations, temperatures will be rising above freezing for the first time in over a week and you will probably see some localized damp sluffs as cold, dry snow warms up for the first time, especially below about 8,000’.
Bottom Line (SLC,
There is a MODERATE danger of human
triggered avalanches on any steep slope with recent deposits of wind drifted
snow. (Moderate in
We have a beautiful clear day
today with dramatically warming temperatures and we should see some increasing
high clouds this afternoon and tonight in advance of our next weather
system. Today, ridge top winds will diminish
from 30 mph down to around 10 mph and swi
We will be giving a free avalanche awareness talk at Milo Sport on Wednesday, February 12th at . They are on 3300 South and 3119 East.
The Friends of the
To report backcountry snow and avalanche conditions, especially if you observe or trigger an avalanche, remember that the information you have could save someone’s life. Please leave a message on our answer machine at (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.
I will update this advisory by on Tuesday morning.
Thanks for calling!
For an explanation of avalanche danger ratings: