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Most Accurate Forecast Model This Season

Every major weather model, ranked by how close it came to the snow that actually fell — measured against SNOTEL and resort-reported ground truth, across 42,525 verifications. Lower error is sharper. Updated June 25, 2026.

🏆 SnowSure’s 7-model blend wins
Beats the best single model (JMA) by 7.1% this season.
4.89 cm error
Full season1–3 day4–7 day8–14 day
  1. 1
    JMA
    5.26 cm mean error
  2. 2
    ICON
    5.4 cm mean error
  3. 3
    Météo-France
    5.53 cm mean error
  4. 4
    GEM
    5.62 cm mean error
  5. 5
    GFS
    5.82 cm mean error
  6. 6
    ECMWF
    6.91 cm mean error

Method: mean absolute error between each model’s daily snowfall forecast and measured snowfall (SNOTEL + resort-reported), snow days only. The blend combines all reporting models.

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Developers: JSON at /api/v1/leaderboards/most-accurate-model.