| Posted: 8:16 a.m., Wednesday, January 11, 2006 |
Huntington Ravine has MODERATE and LOW avalanche danger. Central Gully has Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Use caution in steeper terrain. All other forecast areas in Huntington Ravine have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.
Unseasonably warm temperatures are invading Mt. Washington. It is currently 39 F (4C) at Hermit Lake and raining lightly. A dynamic weather pattern will dominate the weather today which has us focused on minute details. Here is the data we are going on for today. Light rain this morning will add between .01 and .1" of liquid into our snowpack. A drier slot of air will keep shower activity light for most of the day and then rain will pick up a bit more between 7 pm and 12 am. This shot of moisture is expected to add up to .1" more of liquid to the snowpack. The heaviest precipitation is expected to fall between 1 am and 7 am tomorrow morning and the GFS model is suggestion .25" to .5" of liquid falling in the form of snow. Our focus today is on the rain amounts and intensities. The rain paired with warm weather causing snow melt has us concerned about slab strength deteriorating while they are sitting over loose unconsolidated snow below. With the current forecast, expect slabs to be approaching the Considerable rating late in the day. If liquid equivalents or intensities exceed the forecasted ratings, expect many areas to enter the Considerable rating with natural avalanches being possible. Many areas posted at Low in Huntington were scoured by high winds yesterday. Be weary of isolated pockets of instability in all areas posted at Low. Check tomorrow's advisory before heading out. We could be dealing with new snow and wind loading. Nary a dull moment up here.
THE LION HEAD WINTER ROUTE IS OPEN. Mountaineering skills and equipment are required for safe travel on this route.
The Sherburne Ski Trail is open with varying conditions. Expect new snow, old crust, deep waterbars and typical New England goodness.
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. To improve these skills take an avalanche course. We have all the avalanche courses offered in and around the Mt. Washington Valley this winter on our website, tuckerman.org.
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Avalanche Advisory Archives.
United States Avalanche Danger Descriptions.
Échelle Canadienne de risque d’avalanche.
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