Datasets
Ensemble forecast runs produced by the ECMWF Artificial Intelligence Forecasting System (AIFS) Ensemble model.
4 forecast runs per day (00/06/12/18) 6 hourly steps to 360 (15 days)More information can be found on the implementation page.
X-i: AIFS ENS forecastProduct description
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On 12 May 2026, a new forecast stream will be produced by ECMWF's operational Artificial Intelligence Forecasting System ensemble model (AIFS ENS).
The new forecast stream is for wave forecast runs, marking ECMWF's first operational data-driven wave forecasts.
4 forecast runs per day (00/06/12/18) 6 hourly steps to 360 (15 days)XIII-i: AIFS forecast
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Single forecast runs produced by the ECMWF Artificial Intelligence Forecasting System (AIFS) deterministic model.
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On 12 May 2026, a new forecast stream will be produced by ECMWF's operational Artificial Intelligence Forecasting System deterministic model (AIFS Single).
The new forecast stream is for wave forecast runs, marking ECMWF's first operational data-driven wave forecasts.
4 forecast runs per day (00/06/12/18) 6 hourly steps to 360 (15 days)XII-i: Deterministic AIFS forecast
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Ensemble (ENS) of forecasts providing an estimate of the reliability of a single forecast. Currently there are 50 perturbed members in the ensemble.
ENS offers "High Frequency products" until step 144:
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This licence provides access to ECMWF interactive ecCharts tool to visualise analysis and forecast products Please note that access to the ecCharts is for End User use only (internal).
ECMWF ecCharts web service is available and we are pleased to be able to offer the service for evaluation to customers of ECMWF's web products.
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The sub-seasonal products comprise ensembles of individual forecasts up to 46 days and post-processed products of average conditions (e.g. weekly averages) and the associated uncertainty.
The purchase of the "Basic Set" +72, +96, +120, +144, +168 hrs is a mandatory prerequisite for the purchase of time steps in the range 12 to 66 hours.
The following sub-sets are available from the sub-seasonal forecast (46 days):
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SEAS comprises ensembles of individual forecasts coupled to an ocean model and post-processed products of average conditions (e.g. monthly averages) with the associated uncertainty. Products are available up to 7 months ahead.
The following sub-sets are available:
V-i: Monthly means of ensemble meansField computed from data of the daily individual forecast runs (section V-v) and averaged over all ensemble members. The fields are provided in GRIB code.
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These seasonal data comprises ensembles of individual forecasts coupled to an ocean model and post-processed products of average conditions (e.g. monthly averages) with the associated uncertainty. Products are available for forecast month 8-13, each quarter (February, May, August, November).
The following sub-sets are available:
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Single prediction that uses
observations prior information about the Earth-system ECMWF's highest-resolution modelIFS Medium range Control forecast offers "High Frequency products"
4 forecast runs per day (00/06/12/18) (see dissemination schedule for details) Hourly steps to step 90 for all four runs.Not all post-processed Products are available at 06/18 runs or in hourly steps.
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IFS Medium-range Control forecast (Wave) is coupled to the IFS Medium-range Control forecast and it provides direct output "High Frequency products":
4 forecast runs per day (00/06/12/18) (see dissemination schedule for details) Hourly steps to step 90 for all four runsThe model computes between the latitudes -78 and 90, the output grid is artificially extended to -90.
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Single prediction that uses
observations prior information about the Earth-system ECMWF's highest-resolution modelHRES Direct model output Products offers "High Frequency products"
4 forecast runs per day (00/06/12/18) (see dissemination schedule for details) Hourly steps to step 90 for all four runs.Not all post-processed Products are available at 06/18 runs or in hourly steps.
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