9:09 a.m., Saturday, December 14, 2002 TUCKERMAN AND HUNTINGTON RAVINES HAVE CONSIDERABLE AVALANCHE DANGER. Natural avalanches are possible and human triggered avalanches are probable on steep snow covered open slopes and gullies. Be increasingly cautious in steeper terrain. Another storm is upon us! The summit reported 2 inches (5 cm) of snow this morning which began around 2am. We received 3 inches (8 cm) here at Hermit Lake with between 12% and 13% water content (density). Precipitation is expected to continue through the day till approximately midnight. In the higher elevations above treeline snow should prevail. However, expect the possibility of freezing rain or rain in the gullies, snowfields, and start zones of both ravines. Watch the timing of this very closely. If we don't get this precipitation change till late it will be effecting the stability of 6 or more new inches. This would be more dangerous than this occuring this morning with only 3 inches (8 cm) of new snowfall. This change over seems to be happening with frozen pellets and heavily rimed crystals, but then it goes back to snow again. As this warm pocket of air moves through colder air is following right behind which will change any liquid or frozen precipitation back to snow. Currently wind is from the SE at 40-45 mph (65-70 kph), but should be backing around through the E, NE, and eventually N later today. This will cross load some areas, but significant loading should begin when we get northerly winds. Then later in the day as the storm raps around winds should increase from the NW. This will cause the traditional loading of lee slopes of our prevailing winds, namely E, SE, and S facing aspects. Above treeline elevations are expected to stay as snow through the weather event which means there should be ideal conditions for heavy loading once winds shift. S through E aspects baked in the sun through the day yesterday and then refroze culminating in a classic sun crust. The majority of the new loading over the next 12-24 hours will be deposited on top of this crust. Anticipate poor bonding to this layer. So.. expect the avalanche danger to rise through the day. I don't think we are quite at Considerable yet at 8:00 am, but we will be quite soon. As snowfall densities increase and winds shift expect the instability to rise. If the weather forecast becomes reality EXPECT THE LIKELIHOOD FOR THE DANGER RATING TO BE ON THE UPPER END OF CONSIDERABLE LEANING TO HIGH particularly on E and SE, and S facing aspects later today. 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 mountain weather's effect on the snowpack, and avalanche rescue. THE WINTER LION HEAD ROUTE IS NOW OPEN. IT LEAVES FROM THE HUNTINGTON FIRE ROAD AND HAS ORANGE SIGNS STARTING ON THE TUCKERMAN RAVINE TRAIL AT ROUGHLY THE 1.8 MILE MARK. IT IS STEEP AND CHALLENGING, CRAMPONS, AN ICE AXE, AND THE ABILITY TO USE THEM WITH SKILL ARE REQUIRED FOR SAFE TRAVEL. THE BEST HOLIDAY GIFT YOU CAN GET YOUR BACKCOUNTRY LOVED ONE TO EXPRESS CARING AND CONCERN IS THE AVALANCHE BEACON, PROBE, AND SHOVEL. TOO EXPENSIVE? THINK OF THE CONSEQUENCES OR SPLIT THE GIFT WITH ANOTHER RELATIVE OR FRIEND. YOU'LL NEVER REGRET GIVING IT, ONLY REGRET NOT GIVING IT. PLEASE REMEMBER: o Any new precipitation may increase the avalanche danger, this includes wind transported snow. o Obtain latest weather forecast before starting out. o For more information, contact the U.S. Forest Service Snow Rangers: AMC at Pinkham Notch Visitor Center or Hermit Lake Shelters. o This avalanche bulletin will expire at midnight. Christopher Joosen, Snow Ranger USDA Forest Service White Mountain National Forest