In partnership with: The Friends of the
Utah Avalanche Center, Utah Department of Public Safety Division of
Comprehensive Emergency Management,
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Avalanche ADVISORY
Tuesday, November 30,
2004 7:30 Am
Good
morning, this is Evelyn Lees with the
There are two upcoming
benefits for our partners The Friends of the
Current Conditions:
Yesterday
day was one those rare days where you could keep a down coat on almost all day and
not overheat. This morning, temperatures
are a few degrees warmer, but still in the single digits at most mountain
locations. Winds are from the northwest,
in the 5 to 10 mph range, except across the highest peaks where they are closer
to 20 mph. There is deep powder on all aspects,
but the wind damage is annoying wide spread, and at both upper and mid
elevations.
Avalanche Conditions:
With
clearing skies and good visibility yesterday, there was confirmation of a
widespread natural avalanche cycle during the last storm in the
Avalanche
conditions are complex, and the backcountry terrain can be roughly divided into
the “haves” and “have nots”. On slopes that have slid one or more times during the storm cycle, the avalanche
danger is less, mostly confined to the medium and hard drifts of wind blown
snow from Sunday’s winds. On steep slopes
that have not slid, the avalanche danger
remains CONSIDERABLE. While slides
may be a bit more stubborn today, once they do break, possibly above you, they
will be about 1 to 2’ deep and 100 or more feet wide. The weak layers of buried surface hoar and
sugary faceted snow are notoriously slow to strengthen, and famous for producing
avalanches several days after they are buried.
Warming temperatures today may even make some of these slabs more
sensitive.
Finally,
I will try to update the list of avalanches and PHOTOS on the web later
today.
Bottom Line: There
is still a CONSIDERABLE danger on any slope steeper than about 35 degrees,
especially north through east facing slopes, that has not recently slid. This means that dangerous human triggered
avalanches are likely. Even on steep
slopes that have recently slid, there is a MODERATE danger in
terrain with recent deposits of wind drifted snow. People without excellent
backcountry travel skills should continue to stay off of and out from below terrain
steeper than about 35 degrees, especially north through east facing slopes or
any slope with recent drifts of wind blown snow.
Mountain Weather:
A
weak weather system will move through the area tonight and Wednesday, with a
few inches of snow possible. Skies will
be clear this morning, with increasing high clouds later today. Temperatures will be slightly warmer, in the
mid teens at 10,000’ and the mid 20’s at 8,000’. Winds will be light, less than 15 mph, from
the northwest. Mostly cloudy on
Wednesday, with a few snow showers possible.
The next chance for a stronger storm will be around Sunday.
If
you are getting out, drop us a line or an email with any reports or
observations from the backcountry. You
can leave us a message at 524-5304 or 1 800-662-4140. Email us at [email protected],
or send a fax to 524-6301.
The
information in this advisory is from the US 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 7:30 Wednesday morning, and thanks for calling.
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