Powder Reliability Leaderboard

Historical powder reliability ranked across all resorts

Powder Reliability Leaderboard
Rank	Resort	Overall	Powder Days	Base	Snow Quality	Conditions	Bad-year days
1	Lotte Arai Resort !	83	100	100	36	33	19.4
2	Akakura Kanko Resort	82	80	95	76	46	14.2
3	GALA Yuzawa	79	100	87	35	42	15.6
4	Akakura Onsen Ski Resort	76	77	94	54	60	13.4
5	Nozawa Onsen Snow Resort	74	81	92	46	36	13.4
6	Myoko Suginohara Ski Resort	73	77	67	83	25	12.4
7	Ikenotaira Onsen Alpen Blick	72	70	83	69	36	11.2
8	Niseko United	72	45	100	93	69	7.2
9	Kiroro Snow World	71	44	100	92	59	6.4
10	Hakuba Happo-One Snow Resort	70	48	100	75	68	7.2
11	Tsugaike Mountain Resort	68	51	100	67	56	7.2
12	Sapporo Kokusai Ski Resort	68	36	100	96	57	5.2
13	Geto Kogen Ski Resort	67	47	100	73	32	7
14	Hakuba Cortina Snow Resort	66	61	92	53	32	10
15	Naeba Ski Resort	66	60	67	86	17	8.4
16	Maiko Snow Resort	63	79	84	10	43	14
17	Kandatsu Snow Resort	63	77	76	24	29	12
18	Madarao Mountain Resort	63	58	77	62	39	11
19	Hakuba Goryu & Hakuba47	61	34	100	66	61	6
20	Sapporo Teine	61	24	100	89	60	2.2
21	Rusutsu Resort	58	19	100	88	49	2.2
22	Hakuba Norikura Onsen Snow Resort	57	54	83	31	49	8
23	Furano Ski Resort	57	13	100	93	55	1.2
24	Shiga Kogen Yakebitaiyama	55	28	79	87	14	4
25	Hoshino Resorts Nekoma	52	32	75	62	54	3
26	Appi Kogen	52	13	92	84	40	0.2
27	Hoshino Resorts Tomamu	52	11	86	95	37	1
28	Takasu Snow Park	50	30	72	60	71	3.2
29	Asarigawa Onsen Ski Resort	48	25	61	76	67	3
30	Hakuba Iwatake Snow Field	47	32	78	34	71	5
31	Zao Onsen Ski Resort	43	12	55	91	50	1
32	Tazawako Ski Resort	42	21	46	81	35	3
33	Palcall Tsumagoi Resort	28	15	8	81	23	2
34	Canmore Ski Village	21	4	0	79	50	0

Powder Reliability Leaderboard
Rank	Resort	Overall	Powder Days	Base	Snow Quality	Conditions	Bad-year days
1	Niseko United	95	100	100	81	78	7
2	Kiroro Snow World	77	65	100	78	55	2.2
3	Akakura Kanko Resort	73	67	95	61	56	2
4	Geto Kogen Ski Resort	73	64	100	68	34	4
5	Akakura Onsen Ski Resort	72	76	94	36	73	2
6	Hakuba Happo-One Snow Resort	72	63	100	58	64	2.2
7	Nozawa Onsen Snow Resort	71	82	92	30	44	3
8	Sapporo Kokusai Ski Resort	71	49	100	86	40	2
9	Tsugaike Mountain Resort	70	61	100	50	64	3
10	GALA Yuzawa	68	81	87	22	45	4
11	Rusutsu Resort	68	52	100	67	44	3
12	Naeba Ski Resort	66	65	67	76	29	3
13	Hakuba Goryu & Hakuba47	66	54	100	48	65	2
14	Furano Ski Resort	66	39	100	81	59	1.2
15	Ikenotaira Onsen Alpen Blick	65	61	83	53	56	1.2
16	Myoko Suginohara Ski Resort	64	63	67	64	49	2
17	Hakuba Cortina Snow Resort	62	58	92	37	48	2.2
18	Lotte Arai Resort !	60	63	100	3	60	3.2
19	Madarao Mountain Resort	60	56	77	46	54	2.2
20	Sapporo Teine	60	27	100	78	58	0.2
21	Maiko Snow Resort	56	61	84	10	51	3
22	Kandatsu Snow Resort	55	66	76	13	32	3
23	Hakuba Norikura Onsen Snow Resort	55	59	83	14	42	2
24	Shiga Kogen Yakebitaiyama	55	32	79	77	23	1.2
25	Appi Kogen	54	21	92	76	40	0.2
26	Takasu Snow Park	53	45	72	41	77	1
27	Hoshino Resorts Tomamu	53	18	86	85	35	1
28	Hakuba Iwatake Snow Field	48	42	78	21	60	1.2
29	Asarigawa Onsen Ski Resort	47	29	61	63	64	1
30	Hoshino Resorts Nekoma	43	25	75	38	45	0
31	Zao Onsen Ski Resort	42	16	55	89	20	0
32	Tazawako Ski Resort	41	24	46	73	35	1
33	Canmore Ski Village	30	32	0	59	55	2
34	Palcall Tsumagoi Resort	27	18	8	68	29	0.2

Powder Reliability Leaderboard
Rank	Resort	Overall	Powder Days	Base	Snow Quality	Conditions	Bad-year days
1	GALA Yuzawa	65	82	87	4	67	1.2
2	Hakuba Happo-One Snow Resort	63	53	100	36	68	1
3	Sapporo Teine	59	38	100	51	52	1
4	Akakura Kanko Resort	57	52	95	24	39	1
5	Geto Kogen Ski Resort	57	42	100	32	56	1
6	Niseko United	57	38	100	44	52	1
7	Kiroro Snow World	57	37	100	45	55	1
8	Tsugaike Mountain Resort	56	48	100	20	45	1
9	Nozawa Onsen Snow Resort	53	52	92	8	39	1
10	Sapporo Kokusai Ski Resort	52	20	100	61	33	0
11	Lotte Arai Resort !	50	40	100	0	75	1.4
12	Appi Kogen	49	22	92	51	69	0
13	Hakuba Cortina Snow Resort	48	38	92	14	48	0
14	Hakuba Goryu & Hakuba47	48	28	100	20	53	0
15	Furano Ski Resort	47	12	100	47	86	0
16	Madarao Mountain Resort	46	45	77	14	30	0.2
17	Myoko Suginohara Ski Resort	46	43	67	33	17	0.2
18	Hoshino Resorts Tomamu	45	18	86	56	27	0
19	Akakura Onsen Ski Resort	44	32	94	8	53	0
20	Maiko Snow Resort	42	38	84	1	26	0
21	Kandatsu Snow Resort	40	38	76	1	35	0
22	Hoshino Resorts Nekoma	39	26	75	16	62	0
23	Ikenotaira Onsen Alpen Blick	39	23	83	15	43	0
24	Naeba Ski Resort	39	22	67	42	23	0
25	Hakuba Norikura Onsen Snow Resort	37	27	83	4	38	0
26	Shiga Kogen Yakebitaiyama	36	17	79	54	20	0
27	Rusutsu Resort	35	10	100	37	17	0
28	Takasu Snow Park	33	18	72	10	73	0
29	Zao Onsen Ski Resort	26	8	55	72	60	0
30	Hakuba Iwatake Snow Field	24	22	78	3	54	0
31	Asarigawa Onsen Ski Resort	23	17	61	22	60	0
32	Palcall Tsumagoi Resort	17	17	8	41	20	0
33	Tazawako Ski Resort	11	7	46	36	25	0
34	Canmore Ski Village	6	10	0	17	17	0

Powder Reliability Leaderboard
Rank	Resort	Overall	Powder Days	Base	Snow Quality	Conditions	Bad-year days
1	Akakura Kanko Resort	79	80	95	62	47	18.2
2	GALA Yuzawa	78	100	87	27	46	24.2
3	Niseko United	78	64	100	80	71	15.2
4	Lotte Arai Resort !	75	90	100	22	41	25.2
5	Nozawa Onsen Snow Resort	73	84	92	33	38	20.2
6	Akakura Onsen Ski Resort	73	77	94	41	63	19.2
7	Hakuba Happo-One Snow Resort	72	57	100	67	67	12
8	Kiroro Snow World	72	53	100	78	57	12.2
9	Tsugaike Mountain Resort	70	59	100	56	57	15
10	Geto Kogen Ski Resort	70	55	100	68	36	14
11	Myoko Suginohara Ski Resort	69	75	67	68	31	18.2
12	Sapporo Kokusai Ski Resort	68	41	100	85	50	9.2
13	Ikenotaira Onsen Alpen Blick	67	67	83	54	41	16.2
14	Hakuba Cortina Snow Resort	65	63	92	43	38	16
15	Naeba Ski Resort	64	61	67	75	21	15.2
16	Madarao Mountain Resort	62	61	77	49	41	16
17	Hakuba Goryu & Hakuba47	62	42	100	55	62	10.2
18	Sapporo Teine	62	30	100	79	58	6.2
19	Maiko Snow Resort	61	75	84	8	43	19
20	Kandatsu Snow Resort	60	75	76	17	30	17.2
21	Rusutsu Resort	58	28	100	71	45	6
22	Furano Ski Resort	58	21	100	80	60	5
23	Hakuba Norikura Onsen Snow Resort	56	56	83	23	46	13
24	Appi Kogen	54	18	92	79	46	2
25	Shiga Kogen Yakebitaiyama	53	30	79	76	17	8
26	Hoshino Resorts Tomamu	51	15	86	83	35	3.2
27	Takasu Snow Park	50	35	72	49	73	6.2
28	Hoshino Resorts Nekoma	49	32	75	49	53	5.6
29	Hakuba Iwatake Snow Field	47	36	78	26	66	7.2
30	Asarigawa Onsen Ski Resort	46	27	61	63	65	6.2
31	Zao Onsen Ski Resort	43	13	55	88	42	2
32	Tazawako Ski Resort	41	22	46	73	35	4
33	Palcall Tsumagoi Resort	26	17	8	68	24	4
34	Canmore Ski Village	22	13	0	61	49	2.2

How scores are calculated

Powder Days 45%

Powder Days (45%): the average number of powder days per season. A powder day has ≥ 20 cm of new snow, read from either the weather station OR the resort's own day-over-day depth gain, whichever catches it. The count is normalised to a per-window ceiling (20 days in peak season, 30 over the whole season).

Base 28%

Base Reliability (28%): how consistently the resort holds a deep base. For each season, the share of reported days (Dec 15 – Mar 31) with ≥ 150 cm of resort-reported on-mountain depth is scored on a smooth scale, from 0 at ≤ 40% of days deep to full credit at ≥ 55%, and the seasons are then averaged. Adapted from Witmer 1986 / Abegg 1996. It uses the resort's on-mountain depth and does not use the valley station.

Snow Quality 22%

Snow Quality (22%): the fraction of snowfall days where ERA5 daily mean temperature is ≤ −5°C at resort elevation, a proxy for dry, high snow-to-liquid-ratio powder (Kuchera & Ely 2004). ERA5 temperature is lapse-rate corrected to each resort's mid-point elevation. Surface temperature is an approximation of the full vertical profile.

Conditions 5%

Conditions (5%, advisory): the fraction of powder days calmer than the resort's own typical winter wind (below its 75th-percentile ERA5 wind). The anchor is relative because absolute ERA5 grid wind reflects the model's 9 km terrain cell and misses on-slope sheltering. The weight is low, so treat it as a hint.