| Posted: 7:21 a.m., Saturday, March 17, 2007 |
Huntington Ravine has HIGH and CONSIDERABLE avalanche danger. Escape Hatch, South, ODell, Pinnacle and Central Gullies have High avalanche danger. Natural and human triggered avalanches are likely on a variety of slope angles and aspects. Travel in avalanche terrain is not recommended. Yale, Damnation and North Gullies have Considerable avalanche danger. Natural avalanches are possible and human triggered avalanches are probable. Be increasingly cautious in steeper terrain.
Sweet, sweet New England! There's never a dull moment in this part of the world especially if you're willing to enjoy the weather for what it's worth. This morning our weather data is limited and fairly ambiguous. So here's what we know...At Hermit Lake we've picked up about 10"(25cm) of new snow with the top 2"(5cm) being composed of ice pellets. The Summit is currently recording sleet and freezing rain but they do not have any snowfall totals to offer. Before we even begin to talk about any other factors you should have already sensed a major red flag when I mentioned the 2" of heavy stuff that has been laid down over the snow. This is a classic inverted snowpack that tends to show pronounced signs of instability. Precipitation is expected throughout the day but in what form is the million dollar question. Many sources are saying snow but it seems that mixed precip is more likely. Up to .5"(1.2cm) of water is on deck in the atmosphere but the temperatures look like they may increase a few degrees before the low passes by this evening and temperatures drop. When this occurs we will see a shift of the winds to the NW from their current trajectory out of the SE. We expect most areas to have already seen avalanche activity before the switch when wind transport will begin in earnest. Upslope snow is likely after the passage of the low and should continue through a good part of tomorrow. Whether we get snow, mixed precip or straight out rain today, you should expect to see more stress added to a snowpack that has been put together incorrectly if stability is the goal. Unlike the majority of our days, the wind factor is playing second fiddle today to the influence of precipitation type. The blanket of ice pellets can be found on all aspects at all elevations and avalanche activity is expected in most areas. Be smart and play it safe today!
The Lion Head Winter Route is open. This is a steep and challenging route. Crampons, an ice axe, and the ability to properly use this equipment are necessary for safe travel on this route. The John Sherburne Ski Trail is open with a fresh covering of snow to hide the bare spots and rocks that melted out last week. Keep those tips out from under the junk!
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Avalanche Advisory Archives.
United States Avalanche Danger Descriptions.
Échelle Canadienne de risque d’avalanche.
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