In partnership with: The Friends of the Utah
Friday, April 18, 2003
Good Afternoon.† This is Ethan Greene with the
A deep Pacific trough brought
a nice blanket of new snow to the Wasa
Today the winds were generally from the west in the 10 mph range.† Some of the most exposed weather stations recorded gusts in the 20ís this morning.† Temperatures climbed into the mid 30ís at 8,000í and upper 20ís at 10,000í.† Thin clouds in the mid morning allowed last nightís snow to become damp below about 9,500í, but in general the snow surface is quite soft.
Snow conditions were quite variable before the storm, and that pattern hasnít changed much since.† In areas below about 8,500í the old snowpack is still wet and mushy.† These areas are now covered with a blanket of new snow and it will take a while for the old snow to refreeze.† This wet snowpack is quite weak, so small avalanches could dig down into the old snow.† Fortunately there isnít much new snow in these areas, and the old snow is generally supporting its new load.
Above about 9,500í were the old surface was frozen it is relatively easy to trigger small sluffs and soft slabs on steep slopes.† These slides are either running on the old snow surface or a weakness within the new snow.† They are generally less than 10 inches deep and are most dangerous if they can push you off a cliff or into a tree or gulley.†
It looks like the snow is almost over, and if we donít get much more our avalanche problems will stay near the snow surface.† Fresh wind drifts will be easy to trigger on steep slopes, and if the sun breaks through the clouds the new snow will become quite active.
Bottom Line (SLC,
On Saturday the avalanche danger will still be LOW in areas that received less than about 6 inches of snow.† In areas with more than about 8 inches of snow the avalanche danger will be MODERATE on slopes steeper than 35 degrees.† As the sun breaks through the clouds in the afternoon the avalanche danger will rise on all sun exposed slopes.
Logan Ė call 435-797-4146 or Click Here.
Snowfall rates should
decrease this evening as the trough axis passes over the Wasa
To report backcountry snow and avalanche conditions, especially if you observe or trigger an avalanche, call (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 about on Saturday morning.
Thanks for calling!
For an explanation of avalanche danger ratings: