|
|
Saturday, April 25th 2009
Salt Lake Avalanche Advisory
Saturday, April 25, 2009
Created at 9:44 pm
Forecaster: Bruce Tremper
|
|
BOTTOM LINE
Danger by aspect and elevation on slopes approaching 35° or steeper.
(click HERE for tomorrow's danger rating)
|
Danger Rose Tutorial
|
The avalanche danger will remain MODERATE on slopes approaching 35 degrees and steeper for both wind slabs within the new snow, mostly along the upper elevation ridges and also for damp or wet avalanches at lower elevations. Remember, most of the ski areas are closed for the season, and no one is doing any avalanche control. |
|
|
CURRENT CONDITIONS |
|
Alta Collins weather station is up to 10 inches of new snow with one inch of water weight. Most other locations have about half that amount. It started out as a very warm storm and you can still feel the wet snow underneath the new snow. The first 5 inches came in with temperatures near freezing and the snow later on Saturday came in after temperatues dropped into the mid 20's. The temps are expected to be in the lower 20's overnight. |
|
|
RECENT ACTIVITY |
|
Avalanche activity was the usual variety you would expect with a wet, spring storm like this. One slab released near the top of Superior and traveled 2/3rds of the way down as a wet avalanche. Another similar slide released off of Baldy. Snowbird is the only area still open and they were reporting some small, new snow slides. |
|
|
THREAT #1 |
|
| WHERE |
PROBABILITY |
SIZE |
TREND |
|
|
|
|
| |
|
|
Over the next
24 hours.
|
|
|
I would expect that the warm, new snow as well as the old, wet snow would lock up fairly well with the colder temperatures. But there is more snow on the way for Sunday, so we will likely have another round of localized, new snow, avalanche problems. You should watch for the usual wind slabs along the upper elevation, wind exposed ridges. Some of the slabs within the new snow may quickly turn into damp or wet avalanches as they descend. Finally, you should watch for continued wet avalanche activity especially at lower elevations, at or below the snow line, where the snow has remained soggy |
|
|
MOUNTAIN WEATHER |
|
And it ain't over yet. We have yet another disturbance dropping down from Canada, which should arrive on Sunday, giving us yet more snow with perhaps 3-6 more inches for the upper elevations of the Cottonwood Canyons. This will come in with temperatures in the lower 20's along the ridge tops, so the new snow will be lighter than the damp snow we had on Saturday. Then, the extended forecast calls for periods of weak disturbances for the rest of the weak as storm rotate around a low pressure center to the north of us. |
|
|
GENERAL ANNOUNCEMENTS |
We will be issuing intermittent afternoon avalanche advisories until around the end of April.
If you want to get this avalanche advisory e-mailed to you daily click HERE.
For a text only version, the link is on the left side bar, near the top.
UDOT highway avalanche control work info can be found by calling (801) 975-4838. Our statewide toll free line is 1-888-999-4019 (early morning, option 8).
Donate to your favorite non-profit – The Friends of the Utah Avalanche Center. The UAC depends on contributions from users like you to support our work. To find out more about how you can support our efforts to continue providing the avalanche forecasting and education that you expect please visitour Friends page.
We appreciate any and all late season avalanche and snow observations, so keep them coming!! Please leave us a message at (801) 524-5304 or 1-800-662-4140, or email us at uac@utahavalanchecenter.org. (Fax 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. |
|
|
This information does not apply to developed ski areas or highways where avalanche control is normally done. This advisory is from the U.S.D.A. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur. |
|
This advisory provided by the USDA Forest Service, in partnership with:
The Friends of the Utah Avalanche Center, Utah Division of State Parks and Recreation, Utah Division of Emergency Management, Salt Lake County, Salt Lake Unified Fire Authority and the friends of the La Sal Avalanche Center. See our Sponsors Page for a complete list. |
|
|
|