Hakuba Now daily snow and weather - Sunday 11th February 2007

Hakuba Now (Archive Report)

Independent and trustworthy daily snow and weather reports from Hakuba region, Japan
ARCHIVE REPORT: Posted at 9:55am on Sunday 11th February 2007
Current weather conditions
Observed fresh snowfall
weather condition
Snow and foggy
Base temp:
0°C

Top temp:
0°C
Precipitation Wind Visibility
precipitation condition
-
wind condition
Northerly light to moderate
Poor
This report
Sunday 11th February 2007, 9:55am
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Archive report: Posted at 9:55am on Sunday 11th February 2007
The latest Hakuba Now report can be found here

This morning the gentle rumble of the roof avalanching was my wake-up call this morning. In the Snow Study Plot there was 15 cm of new snow of moderate density (HN24: 15cm; density: 80 kilograms per cubic metre). The visibility up on the mountain will be mostly poor in the all enveloping cloud. A good strategy would be to stay close to the run edge to use fences and trees for reference. Keep the eyes moving to avoid the "bunny in the headlights" syndrome. By careful and watch out for the threat from above at all times.

The report from the top of the Tsuga Ike Lift Company terrain (1,700 m a.s.l.) is :
Sky:Obscured
Temperature: -8.0
Wind: gusting to Moderate (20 to 40 km/hr.) from the west
Precipitation: Snowing at the rate of 4 cm accumulation per hour (S4)
Storm snow: 30 to 45 cm of low density snow (maybe 60 to 50 kilograms per cubic metre)
^^^^^^^^^^^^^^^^^^^^^^^^^^

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

Sky: Obscured
Temperature: Present: -2.5 C
Maximum: 8.0 C
Minimum: -2.5 C
Wind at surface: Light from north-east
Winds aloft: not observed
Precipitation: Snowing at the rate of 1 cm accumulation per hour (S1)
Barometer and trend: 909 hPa and steady
Height of new snow in 24 hours (HN24): 15 cm
Amount of water(rain) in 24 hours: 0 mm
Total depth of snowpack (HS): 87 cm
Foot penetration: 29 cm
Surface: New snow, rimed, size 1.5 mm
Density of surface snow: 80 kg/cubic metre
Crust: --
^^^^^^^^^^^^^^^^^^^^^^^^
Hazard:
Above tree line: High

Tree line:High

Below tree line: Considerable

N.B.
We have had something in the order of 30 to 45 cm of storm snow (HST 30 to 45 cm) in the past 48 hours at 1,600 m a.s.l. The winds have been consistently moderate (20 to 40 km/hr.) from the north-west and north-west, so that there has been a lot of wind transported snow loaded on to the melt-freeze crusted southerly slopes and cross loading onto more northerly slopes.

Avalanches observed (2007-02-10):
-- Area: Happo One; number:several; size: one and two; aspect: south-east; elevation: 1,650 m a.s.l.; type: slab; trigger: cornice fall/wind loading/sun heating
--Area: Happo One, Hira Kawa drainage; number: one; size: one; aspect: south; elevation:1,550 m a.s.l.; type: point; trigger: sun
--Area: Happo One, just below Happo Tenbo Lift top station; number: one; size: two; aspect: south-east; elevation: 1,650 m a.s.l.; type: slab; trigger: human(?)
--Area: Norikura Dake; number: one; size: two; aspect: north-east; elevation: 2,300 m a.s.l.; type: slab; trigger: human (snow boarder)

Travel Advisory:
With some 45 cm of storm snow (HST 45 cm) sitting on a melt freeze crust and with consistent moderate northery winds to transport the snow it is not surprising that naturally triggered avalanches are being observed. Also human triggered avalanches are being reported. If you do venture into the back-country when the visibility is poor be wary of the threat from above, whether it is naturally triggered avalanches or other parties of travellers triggering avalanches.

Archive report: Posted at 9:55am on Sunday 11th 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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