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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 there could be differences in the options available depending on your selection of forecast or hindcast years.

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 Hour

Select the lead time(s) you are interested in. This is the time, in hours, from the initialization date.
Bear in mind that some variables are available every 6 hours, and some every 24 hours. You will find that information in the full list of available parameters from the "Documentation" tab and also in the summary table shown in the "Overview" tab of this CDS dataset.
Note that the length of the outputs is at least 6 calendar months, but it may not be the same for all "originating centres".

...

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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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". 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 Level

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

05. Year

Select the year of the initialization date of the model run(s) you are interested in.
Note that there could be differences in the options available depending on your selection of forecast or hindcast years.

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.

06. Month

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

07. 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.

08. Leadtime Hour

Select the lead time(s) you are interested in. This is the time, in hours, from the initialization date.
Note that the length of the outputs is at least 6 calendar months, but it may not be the same for all "originating centres".

...

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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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.

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 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 there could be differences in the options available depending on your selection of forecast or hindcast years.

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.

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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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". 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 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 there could be differences in the options available depending on your selection of forecast or hindcast years.

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.

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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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.

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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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, just GRIB format is available for C3S seasonal forecast datasets.
An experimental netCDF conversion can be accessed by using the CDS API. 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.