20100209 weather data for the 24 hours to 5.30am at 800m

Field Observations:

Yesterday in Hakuba's backcountry: after this storm the snow pack has settled at an amazingly fast pace with huge quantities of powder being transformed into quite dense snow in the space of an afternoon the previous day. Warm temperatures ad strong humid winds were to blame. Ski quality was still ok and stability had improved a lot.

This past storm produced a very widespread avalanche cycle with many size 2's on the NE chutes behind Happo. Gara Gara had a size 2.5, possible 3. The Tsugaike area had multiple size 2's on the north side of Hiyodori. On the south side of Hiyodori the well known slide path had run almost full length, reaching the bottom cat track. This took out a mature hardwood in the lower third of the path.

It was a very active cycle with steep obvious paths all running and much less frequent paths putting on a show as well.

Now rain has arrived in the valley with an uncertain ran/snow line. We will report more on this tomorrow.

Date:
20100209
Cloud Cover:
Obscured
Precip type and rate:
Rain
24hr min temp:
-9C
24hr max temp:
5C
Present temp:
1C
24hr new snow (HN24):
1cm
New snow from current storm (HST):
55cm
Snow height (HS):
203cm
Weight of new snow (100mm tube dia):
0gm
Water equiv of new snow:
0mm
Density new snow:
0kg/m3
Surface crystal size:
2mm
Surface crystal form:
Wet Grains
Wind speed:
Light
Wind direction:
SE
Barometric Pressure:
919mbar
Baro trend (last 3 hours):
Steady

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