Page History

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that years in both the hindcast period and real-time forecasts are shown here together. You can find more details about hindcast and forecast years availability in the Start dates available in the CDS per forecast system page.

Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

05. Month

Select the month of the initialization date of the model run(s) you are interested in.

06. Day

Select the day of the initialization date of the model run(s) you are interested in.
Note that due to different production schedules, the available dates may differ between hindcasts and forecasts and between "originating centres".
You can find more details about the production schedules in the Description of the C3S multi-system table.

07. Leadtime

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Pressure

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Product

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Pressure

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres". Note that for a given start date you could find more than one system available for a single "originating centre".
Please note that you must pair up your forecasts with the relevant hindcasts by using the same "system" for both of them.A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Forecast type

Select the type of the forecast you are interested in from real-time forecasts ("forecast") or retrospective forecasts ("hindcast").

Please note that you must use the hindcast data in order to make a meaningful use of the forecast data. And remember you must pair forecasts and hindcasts up by using the same "system" for both of them.

05. Year

Select the year of the initialization date of the model run(s) you are interested in.

06. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

07. Format

The individual data files in this dataset are stored in netCDF format and the multiple files from a single data request will be bundled together on a single file.
You can choose the format of your preference for that single file.

08. Terms of

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres".
A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Product

type

Select the monthly product you are interested in.
Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that anomalies are just available for real-time forecasts start dates.

06. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

07. Leadtime

month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

08. Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

09. Format

You can select the data format for your data retrieval.
Currently, GRIB format is used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed. You can find some related information in the "Documentation" tab.

10. Terms of

use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.

01. Originating

centre

Select the name of the institution the forecasting system of your interest originates from.

02. System

Select the version of the forecasting system. This is a numeric label and the available values are different for the different "originating centres".
A full description of the use of the system keyword is available from the "Documentation" tab.

03. Variable

Select the parameter(s) you are interested in.

04. Pressure

level

Select the pressure level(s) for the variables you are interested in.

05. Product

type

Select the monthly product you are interested in.
Note that the products under the category "Individual members" consist of all available individual ensemble members, while those in the category "Ensemble" have a single value for each forecast system ensemble.

06. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that anomalies are just available for real-time forecasts start dates.

07. Month

Select the month of the initialization date of the model run(s) you are interested in.
Note that in the current setup all monthly products are encoded using as nominal start date the 1st of each month, regardless of the real initialization date. You can find more information about how nominal start dates are assigned in the "Documentation" tab.

08. Leadtime

month

Select the lead time(s) you are interested in. This is the time, in months, from the initialization date.
Note that the convention used for labelling the data implies that leadtime_month=1 is the first complete calendar month after the initialization date. In the current setup of all datasets that means that for a forecast initialised on the 1st of November, leadtime_month=1 is November.

09. Geographical area

You can select a global field ("whole available area") or a regional subselection by providing the latitude and longitude of its corners.

10. Format

You can select the data format for your data retrieval.
Currently, GRIB format is used to store C3S seasonal forecast datasets data files.
An experimental netCDF conversion can be also accessed. You can find some related information in the "Documentation" tab.

11. Terms of

use

You must accept the terms and conditions of the Copernicus User Licence in order to access the C3S seasonal forecast data.