Users are reminded that maximum charge and NMHS licences currently permit you to 12 changes per year to your real-time data requirements (according to your contract).

Changes are approved at ECMWF discretion and we are currently reviewing the limits. 

  1. Access the Product Requirements Editor (PREd) web application, using your username and password.
  2. Select the data you require by browsing the ECMWF catalogue of real-time products. This web catalogue reflects the forecast products available for dissemination.​
  3. If changes are required to your licence (for example, the addition of high-frequency products) contact us by raising a ticket through the Support Portal.
  4. Modify your real-time requirements in the Product Requirements Editor (PREd)
    Requirements are validated according to:​
    1. What's available
    2. ​Which data you are permitted to access (not all customers pay to access the high-frequency products).
  5. Once the data has been installed, files are produced by the product generation system - you can review these files on the ECMWF Production Data Store (ECPDS)

Getting started with the Product Requirements Editor

Requirements are grouped in logical containers. At the top level we have the organisation. Organisation contains 1 or more destinations, each representing a physical host. 

Destinations contain feeds. These are containers where you will be able to see the editor and the dissemination requirements.

Create a draft from this page and edit it. A draft is your working canvas. 

If you want to install new data to test, please install your data in a test feed (that starts with T). If you would like to install your requirements in operations right away, you can install them in an operational feed.

You can install your data with the help of so-called snippets (<>), see below for more information about this tool.

By clicking on the bug symbol, you can check if your data configuration validates. The tools below can help you. 

If everything is alright, the bug turns green. You can then send in a publication request.


If you want to install new data to test, please install your data in a test stream (that starts with T). If you would like to install your requirements in operations right away, you can install them in an operational stream. You can install your data with the help of so-called snippets (<>).

As a user you cannot add a new feed. If you want a new feed, please contact us through the Support Portal and ask for the new feed: also include the desired name and description.

By clicking on the bug symbol, you can check if your data configuration validates. If there is an error somewhere, the bug turns red. If you hover over the (info) icon, you will get more information about the error. For some common validation errors, please have a look at the following page: Common validation errors If you cannot figure out what is wrong, please save your configuration as a draft and contact us through the Support Portal.