Hakuba Now daily snow and weather - Saturday 10th February 2007

Hakuba Now (Archive Report)

Independent and trustworthy daily snow and weather reports from Hakuba region, Japan
ARCHIVE REPORT: Posted at 10:13am on Saturday 10th February 2007
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Saturday 10th February 2007, 10:13am
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Archive report: Posted at 10:13am on Saturday 10th February 2007
The latest Hakuba Now report can be found here

The rain was pitter pattering on the roof all night such that there was 14 mm of water in the precipitation gauge this morning at 'reading time' (0700 hrs.). The good news is that there is fresh snow on the trees at about the 1,100 m a.s.l. line. New snow, at a density of 100 kg/cubic metre, would be 14 cm deep with that amount of water (14 mm). So be of good cheer. Also there is a forecast for more snow fall this evening (about 1cm per hour for 15 hours).

The Hira Kawa Snow Study Plot (830m a.s.l.) 0700 hr. reading is:

Sky: Broken clouds
Temperature: Present: 2.0 C
Maximum: 10.0 C
Minimum: 0.5 C
Wind at surface: Calm
Winds aloft: Moderate from north-west (upper layer of clouds moving)
Precipitation: Nil
Barometer and trend: 909 hPa and steady
Height of new snow in 24 hours (HN24): 0 cm
Amount of water(rain) in 24 hours: 14 mm
Total depth of snowpack (HS): 75 cm
Foot penetration: 21 cm
Surface: melt/freeze crust
Density of surface snow: not measured
Crust: 0.5 cm
Above tree line: Considerable

Tree line: Moderate increasing to Considerable with daily warming

Below tree line: Low increasing to Moderate with daily warming

N.B. hazard will increase with day time warming. The forecast high in the valley is 7C. Use your thermometer! Also the wind at ridge top in the alpine (above tree line) is moderate (20 to 40 km/hr) from the north-west. Snow plumes are visible all along the Norikura Dake and Tengu Para. The fracture lines on the south slope of Norikura Dake is filled in.

Travel Advisory:
The new snow (possibly 20 cm or so above tree line) is being moved around by the wind. The formation of soft slabs is probable. At tree line the pockets of buried surface hoar are now more deeply buried although there is the possibility that there was more (surface hoar) formed on the night of 2007-02-07 that is now preserved under possibly 30 or more cm of snow at these elevations.

Below tree line, especially below 1,500 m a.s.l. the overnight rain has introduced a lot of load on the isothermal (all the same temperature i.e. 0C) snow pack and has not added any strength to the snow pack. With the daily warming, especially on steep sun affected slopes surprises could be encountered especially if the 'surprise' pushes you into some creek hole head first.

Archive report: Posted at 10:13am on Saturday 10th February 2007
The latest Hakuba Now report can be found here

Hakuba Now ski lift operation notes:

All resorts running. Some of the 137 lifts in the Hakuba valley may not be running due to the fact that they are reduntant.

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