| Posted: 8:00 a.m., Tuesday, February 3, 2004 |
Huntington Ravine has LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.
Mild temperatures dominated the summit yesterday with the maximum recorded at -1C (30 F). Accompanying winds were light to nonexistent which produced conditions favorable for strengthening of our snowpack. As today's sun rises we're getting ready for a weathermaker which is expected to provide us with some precipitation late in the day. Total accumulations should reach 15 cm (6 in) but we can always hope for more. The fantastic news about this storm is that temperatures are supposed to fall as time goes on which will most likely mean a decrease in snow density over time. This progression is generally better for stability as compared to when a heavy slab of dense snow is laid down over a layer of light and fluffy powder. Also, the heavy snow will better stick to exposed ice and the various crusts found around the ravines.
As snow or other types of precipitation begin to fly we will see an increase in avalanche danger. The heavier it falls the more rapid the rise in danger. Winds are forecasted to increase in intensity as well which will form windslab in lee areas. They will begin blowing out of the south and eventually wrap around to the northwest effectively loading most aspects. We will be closely watching the areas currently posted at Moderate. These areas have shown substantial avalanche activity during the past month often failing on a deeply buried rain crust. If and when the stress outweighs the strength in newly deposited slabs, we may see avalanches step down to this weak layer producing some spectacular results. Better to see the pictures on the web then witness them firsthand!
The John Sherburne ski trail has variable conditions. Expect areas of water ice, emerging rocks and abrupt water bars. Be prepared for sudden changes in the trail.
THE LION HEAD WINTER ROUTE IS OPEN. This is a steep and challenging route. Ice axe, crampons, and the skill to use them well are necessary for safe travel. Remember, it is always easier to go up than come down.
AS ALWAYS, THIS ADVISORY IS ONE MORE TOOL TO HELP YOU MAKE YOUR OWN DECISIONS IN AVALANCHE TERRAIN. It should be used along with your own snow stability assessments, knowledge of safe travel techniques, skill in reading mountain weather's effect on the snowpack, and avalanche rescue.
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Avalanche Advisory Archives.
United States Avalanche Danger Descriptions.
Échelle Canadienne de risque d’avalanche.
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