This is Spencer at the Colorado Avalanche Information Center at 10:00 am Friday, October 27, 2006. We will be issuing intermittent early-season updates until regular forecasts begin in early to mid November. If you are getting out, we would like to know what you find. Send us an email at
caic@qwest.net describing the location, conditions, snowpack information, and any avalanche activity. Thanks for the information coming in!
The mid-week storm dropped 10-22 inches of snow around the state. The heaviest snow was in Summit County and the Front Range, both the mountains that we usually talk about and out on the flats. Accumulations were closer to 10 inches west and south of Vail Pass. The Denver Post has a nice map of snow totals (
http://www.denverpost.com/news/ci_4557486). Observers report a few natural avalanches around Loveland Pass. Windloaded pockets on north through east to southeast aspects ran 2-3 feet deep and up to 200 feet wide.
SNOWPACK
This week's storm in the Northern Mountains made it feel like winter. However, we are still dealing with an early season snowpack. Below treeline in the Northern Mountains, the snowpack is made of only a few storms. At the base is a thin layer of weak facets from the earliest storms. Topping the facets is a stronger, mostly supportable layer that makes a good base for turns. Topping that is the mid-week snow. Ten to twenty inches fell below treeline, but it is settling rapidly. This weekend's warm temperatures will continue to consolidate the snow, building a good base for the next snowfall.
Conditions are more interesting near and above treeline through out the state. The bottom of the snowpack is a mixed bag, with pockets of weak faceted snow, crusts, or stronger snow. The weakest snow will be on shady slopes, where the early snow turned to facets instead of melting. You will find stronger snow on sunny aspects, where the recent storms are resting on the ground. It will take some sleuthing to determine what is under the recent snow.
The latest storm came in with relatively light winds. Instead of huge, widespread windslabs, the problem is smaller pockets of wind-drifted snow. Winds will pick up on Friday, drifting additional snow and forming more pockets. These little pockets can surprise the unwary traveler. Look for rounded, pillow-like drifts around rocks, along gullies, or other terrain features. There will be larger and more widespread drifting in the Northern Mountains because there is more snow available.
It is early season. Make sure you tune up your avalanche brain. Do some beacon practice, flip through your favorite avalanche book, or brush up your avy savvy with this online tutorial:
http://www.fsavalanche.org/NAC/IBTpages/index.html Remember your safe travel protocols. In avalanche terrain, move one at a time, from safe spot to safe spot. Do not jump onto a slope above another party. If you are hiking at a ski area, treat it like is the backcountry until the area opens. They are not doing any avalanche control yet.
SLogan