Yesterday's weather maker dropped .88 cm (.35 in) of liquid precipitation on the summit of Mt. Washington and .96 cm (.37 in)of liquid at Hermit Lake. This fell as snow first, then changed to freezing rain and finally rain, which was the primary form of precipitation from the event. Rain runnels are evident in the ravines as a result of the water percolating down through the snowpack and draining downhill. A thin crust is present on the snow surface and should continue to develop through the day. Warmer temperatures are expected later in the day which will slow the development of this crust a bit. Why does this matter? Snow in forecasted to begin late tonight and through tomorrow. The development of the crust will determine how well new snow bonds to the old surface. If it stays rough then the snow may bond well to it. If the crust develops into a slippery surface then it will be a great sliding surface for new snow. As for the new snow, the weather forecast is not certain as to how much snow we will get. I think we can expect anywhere from 7.5 to 15 cm (3 to 6 in) of snow, but hopefully more. If you are heading into the mountains tomorrow, anticipate increasing avalanche danger associated with this weather maker.

The John Sherburne ski trail has variable conditions. Expect variable conditions with areas of ice, some blowouts, abrupt water bars, open holes, and running water. Recent warm temperatures and rain have exaggerated these problems.

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.