Score trend pulse
Among open resorts with a latest SnowSure trend signal (48 mountains). GPT-4o labels each score as improving, stable, or declining.
Improving
22.9%
11 resorts
Stable
68.8%
33 resorts
Declining
8.3%
4 resorts
Powder days this season
Tracked powder events, SnowSure-only. Northern Hemisphere 2026–27 · Southern Hemisphere 2026.
| 1 | Las Leñas | 49 days |
| 2 | Caviahue | 48 days |
| 3 | Nevados de Chillán | 43 days |
| 4 | Chapelco | 42 days |
| 5 | El Colorado | 41 days |
| 6 | Valle Nevado | 40 days |
| 7 | Corralco | 40 days |
| 8 | Cerro Catedral | 38 days |
| 9 | Antuco | 37 days |
| 10 | Portillo | 37 days |
| 11 | Antillanca | 35 days |
Bluebird days this season
Clear-sky powder mornings, verified or predicted. Northern Hemisphere 2026–27 · Southern Hemisphere 2026.
| 1 | El Colorado | 7 days |
| 2 | Valle Nevado | 6 days |
| 3 | La Parva | 5 days |
| 4 | Lagunillas | 5 days |
| 5 | Roundhill | 5 days |
| 6 | Mt Dobson | 5 days |
| 7 | Mt Hutt | 4 days |
| 8 | Las Leñas | 4 days |
| 9 | Afriski | 3 days |
| 10 | La Hoya | 3 days |
| 11 | Crans-Montana | 3 days |
Where models disagree
14-day snowfall spread across ECMWF, GFS, GEM, JMA, ICON, Météo-France, and Met Norway — minimum 5 cm spread to qualify.
| # | Resort | Spread | Avg forecast |
|---|---|---|---|
| 1 | Cerro CatedralArgentina | 182.4 cm | 70.4 cm |
| 2 | Ski PucónChile | 158 cm | 129.3 cm |
| 3 | Cerro Perito MorenoArgentina | 155.5 cm | 59.5 cm |
| 4 | CorralcoChile | 112.7 cm | 89.9 cm |
| 5 | Nevados de ChillánChile | 96.5 cm | 101.6 cm |
| 6 | PortilloChile | 91.2 cm | 92.8 cm |
| 7 | Las AraucariasChile | 90.4 cm | 79.1 cm |
| 8 | LagunillasChile | 90.4 cm | 45.7 cm |
| 9 | AfriskiLesotho | 85.6 cm | 37.7 cm |
| 10 | Temple BasinNew Zealand | 84.4 cm | 41.4 cm |
| 11 | La ParvaChile | 81.4 cm | 71 cm |
| 12 | Las LeñasArgentina | 77.9 cm | 59.1 cm |
Upcoming bluebird predictions
Predicted clear-sky powder mornings 1–3 days ahead. Track record: 0/221 verified correct (0%).
| Resort | Predicted day | Confidence | Fresh snow |
|---|---|---|---|
| Pila | Fri, Sep 18 | low | 12.4 cm |
| St-Luc-Chandolin | Fri, Sep 18 | low | 8 cm |
| Crans-Montana | Fri, Sep 18 | low | 7.6 cm |
| Les Menuires | Fri, Sep 18 | low | 7.2 cm |
| Tignes | Fri, Sep 18 | low | 6.6 cm |
| Marmolada | Fri, Sep 18 | low | 9.6 cm |
| Val Thorens | Fri, Sep 18 | low | 7.2 cm |
| Grands Montets | Fri, Sep 18 | low | 14 cm |
| Arabba | Fri, Sep 18 | low | 9.6 cm |
| Showdown Montana | Fri, Sep 18 | low | 9 cm |
Best model by region
Weekly MAE-based skill scores from verified forecasts. See Forecast Trust for the full verification corpus.
| Region | Top model | Skill score |
|---|---|---|
| Alps | Météo-France | 71.8 |
| andes | JMA | 52.1 |
| cascades | ICON | 78.6 |
| Rockies | ECMWF | 82 |
| sierra | ECMWF | 72.2 |
| southern-alps | GFS | 36.6 |
Use this data in your app
Every dataset on this page is available via public REST endpoints and the SnowSure MCP server. Start with the trends catalog, or pull per-resort season stats and score component history.
GET /api/v1/trends · GET /api/v1/leaderboards/extended-outlook · GET /api/v1/forecasts/disagreement
