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
Wednesday, March 05, 2003
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Good Morning. This is Evelyn Lees with the
Yesterday, the snow, wind and
cold finally made it feel like winter, with fiendish trail breaking in the
higher, wind drifted terrain. And, like
a true Wasa
Yesterday, the moderate westerly winds created sensitive drifts along the higher ridges and in open exposed terrain. Several backcountry parties were able to trigger 1 to 2 deep, 50 wide new snow slides, a few breaking into upper, old snow layers. There were also numerous shallow natural slab avalanches, 2 to 10 deep, breaking in a layer of lighter density snow.
Today, the avalanche activity will be more wide spread, especially in wind affected terrain. On steep slopes with wind drifts, expect both natural and easily triggered sensitive wind slabs 2 to 3 feet deep. While the wind drifts will be most common on northeast, east and southeast facing slopes, they will also be found on most exposed ridge lines, along gully walls and around terrain features such as sub ridges and rocks. Once triggered, the new snow sluffs and slides could break into the older, weak layers, creating much larger and more dangerous slides up to 5 feet deep. These deeper slides are possible on slopes of all aspects, north, east, south and west, and especially on steep, rocky slopes with a thin snowpack. It may be possible to trigger slides from a distance today. Even out of the wind affected terrain, sluffing and new snow soft slabs up to 2 feet deep are possible on any steep slope. Wind speeds are forecast to increase later today, and the areas of wind drifted snow will become more widespread and the avalanche danger will increase.
Bottom Line (SLC,
Today there is a CONSIDERABLE danger on any steep slope with recent drifts of wind blown snow. Considerable means that human triggered avalanches are likely and natural avalanches possible. As the winds increase later today and tonight, the danger on steep, wind drifted slopes may rise to HIGH, with natural avalanche likely. On steep slopes without recent wind drifts, there is a MODERATE danger, meaning that human triggered avalanches are possible.
A strong, moist westerly flow
will set up over the northern
To report backcountry snow and avalanche conditions, especially if you observe or trigger an avalanche, 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 Thursday morning.
Thanks for calling!
For an explanation of avalanche danger ratings: