Snow and Weather Data

For the preceding 24 hours to 7am at 800m elevation.  Hakuba backcountry snowpack and avalanche conditions below are used at your own risk, Click -All- to view entire season data.

Date Snow Depth 24hr New Snow 24hr New Snow Density 24hr New Water Equiv AM temp Max temp Min temp Precip type and rate Rain Altitude
20190322
60cm
0cm
~ ~ ~ ~ ~
Nil
~
20190321 ~ ~ ~ ~ ~ ~ ~
Rain - moderate
2,400m
20190320
70cm
0cm
~ ~ ~ ~ ~
Nil
~
20190319
75cm
0cm
~ ~ ~ ~ ~
Nil
~
20190319
86cm
0cm
~ ~ ~ ~ ~
Nil
~
20190318
91cm
11cm
~ ~ ~ ~ ~
Nil
~
20190317
80cm
0cm
~ ~ ~ ~ ~
Nil
~
20190316
84cm
0cm
~ ~ ~ ~ ~
Nil
~
20190315
101cm
0cm
~ ~ ~ ~ ~
Nil
~
20190314
112cm
39cm
~ ~ ~ ~ ~
S < 1cm/hr
~
20190313
75cm
4cm
~ ~ ~ ~ ~
S 2cm/hr
~
20190312
71cm
0cm
~ ~ ~ ~ ~
Nil
1,600m
20190311
75cm
0cm
~ ~ ~ ~ ~
Rain - moderate
1,600m
20190310
84cm
0cm
~ ~ ~ ~ ~
Nil
~
20190309
91cm
0cm
~ ~ ~ ~ ~
Nil
~
20190308
111cm
26cm
~ ~ ~ ~ ~
S < 1cm/hr
~
20190307
79cm
0cm
~ ~ ~ ~ ~
Rain - light
1,300m
20190306
84cm
0cm
~ ~ ~ ~ ~
Nil
~
20190305
88cm
2cm
~ ~ ~ ~ ~
Nil
1,500m
20190304
89cm
0cm
~ ~ ~ ~ ~
Rain - light
1,300m
20190303
93cm
0cm
~ ~ ~ ~ ~
Nil
~
20190302
95cm
0cm
~ ~ ~ ~ ~
Nil
~
20190301
98cm
0cm
~ ~ ~ ~ ~
Nil
~
20190228
102cm
0cm
~ ~ ~
6C
-2C
Rain - light
1,500m
20190227
105cm
0cm
~ ~
-5C
3C
-5C
Nil
~
20190226
108cm
0cm
~ ~
0C
11C
0C
Nil
~
20190225
113cm
0cm
~ ~
-5C
10C
-5C
Nil
~
20190224
121cm
0cm
~ ~
-8C
2C
-8C
Nil
~
20190223
126cm
0cm
~ ~
-3C
8C
0C
Nil
~
20190222
131cm
0cm
~ ~
-6C
4C
-6C
Nil
~
20190221
134cm
3cm
~ ~
-1C
5C
-2C
Nil
~
20190220
140cm
0cm
~ ~
3C
12C
1C
Nil
3,000m
20190219
146cm
0cm
~ ~
-2C
5C
-4C
Nil
~
20190218
154cm
0cm
~ ~
-11C
2C
-11C
Nil
~
20190217
167cm
15cm
~ ~
-3C
1C
-4C
Nil
~
20190216
156cm
1cm
~ ~
0C
2C
-2C
S < 1cm/hr
~
20190215
161cm
0cm
~ ~
-10C
-2C
-10C
Nil
~
20190214
166cm
13cm
49kg/m3
6mm
-5C
-2C
-5C
S 1cm/hr
~
20190213
164cm
11cm
46kg/m3
5mm
-3C
-3C
-7C
S < 1cm/hr
~
20190212
158cm
13cm
98kg/m3
13mm
-2C
2C
-3C
S < 1cm/hr
~
20190211
152cm
1cm
~ ~
-8C
-3C
-9C
S < 1cm/hr
~
20190210
164cm
21cm
67kg/m3
14mm
-5C
-3C
-6C
S 1cm/hr
~
20190209
134cm
6cm
85kg/m3
5mm
-6C
-4C
-7C
Nil
~
20190208
138cm
9cm
71kg/m3
6mm
-5C
12C
-5C
S < 1cm/hr
1,100m
20190207
132cm
0cm
~ ~
-6C
7C
-6C
Nil
~
20190206
134cm
0cm
~ ~
-4C
5C
-5C
Nil
~
20190205
146cm
4cm
~ ~
-2C
3C
-3C
Nil
~
20190204
144cm
0cm
~ ~
3C
6C
2C
Rain - light
2,400m
20190103
156cm
0cm
~ ~
-5C
6C
-10C
Nil
~
20190202
157cm
2cm
~ ~ ~ ~ ~
Nil
~
20190201
165cm
20cm
~ ~ ~ ~ ~
Nil
~
20190131
150cm
1cm
~ ~ ~ ~ ~
Nil
~
20190130
165cm
0cm
~ ~ ~ ~ ~
Nil
~
20190129
175cm
31cm
~ ~ ~ ~ ~
Nil
~
20190128
157cm
0cm
~ ~
-9C
-1C
-12C
Nil
~
20190127
172cm
26cm
78kg/m3
20mm
-5C
-3C
-5C
S < 1cm/hr
~
20190126
159cm
21cm
82kg/m3
17mm
-4C
0C
-4C
Nil
~
20190125
152cm
9cm
92kg/m3
8mm
-7C
-3C
-7C
Nil
~
20190124
175cm
37cm
71kg/m3
26mm
-4C
5C
-5C
S 1cm/hr
~
20190123
139cm
12cm
96kg/m3
10mm
-12C
-2C
-13C
Nil
~
20190122
145cm
31cm
78kg/m3
24mm
-2C
-2C
-3C
S 1cm/hr
~
20190121
128cm
44cm
90kg/m3
39mm
-5C
1C
-5C
Nil
~
20190120
87cm
1cm
~ ~
-3C
2C
-5C
S < 1cm/hr
~
20190119
95cm
0cm
~ ~
-5C
-1C
-5C
Nil
~
20190118
101cm
29cm
88kg/m3
25mm
-6C
4C
-6C
Nil
~
20190117
79cm
8cm
96kg/m3
8mm
-7C
-2C
-7C
Nil
~
20190116
75cm
4cm
64kg/m3
3mm
-1C
5C
-1C
Nil
1,400m
20190115
72cm
0cm
~ ~
-7C
3C
-9C
Nil
~
20190114
75cm
0cm
~ ~
-7C
2C
-7C
Nil
~
20190113
80cm
0cm
~ ~
-5C
3C
-6C
Nil
~
20190112
84cm
0cm
~ ~
-9C
1C
-9C
Nil
~
20190111
93cm
6cm
85kg/m3
5mm
-1C
1C
-1C
Nil
~
20190110
97cm
4cm
~ ~
-15C
-3C
-16C
Nil
~
20190109
107cm
42cm
73kg/m3
31mm
-5C
2C
-5C
S 2cm/hr
~
20190108
71cm
5cm
64kg/m3
3mm
-2C
0C
-3C
Nil
~
20190107
70cm
0cm
~
0mm
-4C
-1C
-7C
Nil
~
20190106
75cm
9cm
92kg/m3
8mm
-3C
3C
-3C
S < 1cm/hr
~
20190105
76cm
2cm
~ ~
-2C
5C
-6C
S < 1cm/hr
~
20190104
83cm
0cm
~ ~
-14C
-2C
-14C
Nil
~
20190103
89cm
16cm
56kg/m3
9mm
-3C
-1C
-5C
S < 1cm/hr
~
20190102
83cm
22cm
64kg/m3
14mm
-2C
1C
-3C
S < 1cm/hr
~
20190101
68cm
0cm
~ ~
-11C
0C
-12C
Nil
~
20181231
61cm
13cm
73kg/m3
10mm
-7C
-1C
-7C
Nil
~
20181230
72cm
18cm
85kg/m3
15mm
-2C
-2C
-6C
S < 1cm/hr
~
20181229
69cm
23cm
80kg/m3
18mm
-4C
-4C
-6C
S 1cm/hr
~
20181228
59cm
41cm
75kg/m3
31mm
-6C
5C
-6C
S 1cm/hr
~
20181227
18cm
0cm
~ ~
1C
4C
1C
S < 1cm/hr
1,400m
20181226
20cm
0cm
~ ~
-2C
3C
-2C
Nil
~
20181225
23cm
0cm
~ ~
-7C
-1C
-8C
Nil
~
20181224
29cm
11cm
65kg/m3
8mm
-2C
4C
-2C
S < 1cm/hr
2,300m
20181223
19cm
0cm
~ ~
1C
7C
0C
Nil
2,300m
20181222
23cm
0cm
~ ~
1C
7C
-2C
Rain - light
2,200m
20181221
29cm
0cm
~ ~
-1C
4C
-1C
Nil
~
20181220
40cm
19cm
121kg/m3
23mm
1C
2C
0C
Nil
900m
20181219
30cm
17cm
60kg/m3
10mm
-1C
3C
-1C
Nil
~
20181218
27cm
17cm
52kg/m3
9mm
-1C
6C
-1C
Nil
~
20181217
20cm
1cm
~ ~
5C
5C
0C
Nil
~
20181216
25cm
0cm
~ ~
-10C
0C
-10C
Nil
~
20181215
29cm
7cm
~ ~
-3C
-3C
-4C
S < 1cm/hr
~
20181214
33cm
33cm
~ ~
-2C
4C
-2C
S < 1cm/hr
~

Hakuba Backcountry Conditions Summary

Thanks for reading my daily updates in January and February. I always finish reporting at the end of February.

Outlook

Winter finished in central Japan on Feb 20th.  There will be bursts of winter weather in March, often falling as rain at valley bottom.

Avalanche Hazard

I have finished my 2019 avalanche comments. March in Hakuba is usually dominated by some kind of rain crust with bursts of new snow, which can be unstable in March and April.

Snowpack Discussion

Spring snowpack, with winter coming and going at higher elevation.

Official JAN Avalanche Bulletin

You should read it, but be aware that on some days this bulletin is not so accurate.  Visit the Japan Avalanche Network at www.nadare.jp. Their website is not well designed, so take care finding the info you need - it can take a few clicks to find the full bulletin, not just a summary. Their site doesn't work perfectly in some browsers. Make sure are you reading the bulletin for Hakuba, and for the current date. It is not in English, yet it is the only bulletin in Japan. Significant limitation - VERY IMPORTANT: due to Japanese forecasting laws, the JAN avalanche bulletin is only a statement of estimated conditions at 7am. It does not include changes to the avalanche danger that may occur during that day due to changes in weather. This makes it dangerously inaccurate on days when there is rain in the forecast for midday, or a rapid rise in temperature, or very rapid new snow accumulation.

The info on this page is intentionally brief. Use at your own risk.

Note on the data

This data is collected daily between 6am and 8am for the previous 24 hours at 800m in Ochikura near Tsugaike ski area. It is part of the daily risk management process in our backcountry guiding operation. Our weather station is in an area that receives more snow than the same altitude further south in the valley.

Rain Altitude is given if it rained at anytime in the preceding 24h hours. Sometimes it is an estimate, other times it is based on observation. In December you should always assume there is a shallow early season rain crust above treeline elevation.

Season Comparisons

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