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HOME > Ensemble Model Prediction

JMA's Ensemble Prediction System (Products for Long-Range Forecasting of WMC Tokyo)

JMA, as a WMO World Meteorological Centre (WMC), operates the ensemble prediction system of an atmospheric global circulation model (AGCM) for one-month prediction and atmosphere-ocean coupled global circulation model (CGCM) for three-month and warm/cold season prediction. Ensemble prediction products, verification charts and specification of the ensemble prediction system are available on this page. JMA was designated as a WMC in 2017 and, as a part of its activities, the Centre conducts global numerical long-range prediction (Global Producing Centre for Long-Range Forecast; GPC-LRF)


  • 14 March 2019
    Announcement: New JMA's One-month Guidance Tool (password required) is launched. Please refer to the commentary for details.

  • 29 September 2017
    Announcement: Due to an update of our account management policy for products of WMC Tokyo, an account inactive over 3 years may be deleted after notification.

  • 14 March 2017
    Announcement: Launch of the JMA's Global Ensemble Prediction System for one-month prediction

  • 17 June 2015
    The SST index time-series forecast product of Three-month Model Prediction is available.

  • 29 May 2015
    JMA's Seasonal Ensemble Prediction System will be upgraded next month. The new model description about JMA/MRI-CPS2 and hindcast gridded data are available. Please refer to the "TCC News No. 40" for details.

Main Products

Monthly Discussion on Seasonal Climate Outlooks  last updated : 24 Jan 2020

This product is intended to assist NMHSs in the Asia-Pacific region in interpreting WMC Tokyo's three-month prediction and warm/cold season prediction products.

Forecast Products in Support of Early Warnings for Extreme Weather Events   last updated : 23 Jan 2020

Early warning products for extreme weather events covering the period up to two weeks ahead. (Only registered NMHSs can access this page.)

  • If you have any questions about ID and/or password, please e-mail to: mail_address
  • Download Products for Long-Range Forecast (LRF) of WMC Tokyo

  • If you have any questions about ID and/or password, please e-mail to: mail_address
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