data api · Europe

ECMWF IFS ENS Weather Model Historical Archive

Archive of grib2 files containing selected variables from ECMWF IFS ENS. This dataset is currently being backfilled. A cloud optimized version of these data are available at https://dynamical.org/catalog/ecmwf-ifs-ens-forecast-15-day-0-25-degree/ and https://source.coop/dynamical/ecmwf-ifs-ens-forecast-15-day-0-25-degree.

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What's in it

Data offered docs-verified: ECMWF IFS ENS ensemble forecast GRIB files · surface variables: sp, 2t, 10u, 10v, 100u, 100v, tp, strd, ssrd, msl, 2d, ptype · pressure level: z (geopotential) at 500 hPa
Coverage docs-verified: 2016-03-08 to 2024-04-01
Resolution docs-verified: 0.25 degree spatial; forecast steps 3-hourly to 144h then 6-hourly to 360h (85 steps)
Formats docs-verified: GRIB Edition 1 (GRIB1)
Access docs-verified: Free, public anonymous HTTPS/S3 access via data.source.coop; licence Creative Commons BY 4.0 (source acknowledgement required)

Useful for

Use cases llm-inferred: Hindcast verification of ensemble precipitation (tp) for flood model calibration or validation · Historical 2m temperature and 10m/100m wind analysis for climate-sensitivity or wind-exposure studies · Ensemble spread and forecast skill assessment for UK catchment or site-specific risk reviews
Audience llm-inferred: hydrologists · flood consultants · climate and meteorological analysts · GIS analysts

Limitations

Constraints docs-verified: Archive is still being backfilled, so the date range is incomplete · Archive covers 2016-03-08 to 2024-04-01 only; later data must come from the ECMWF open data bucket · Only selected surface, 500 hPa and control/perturbed variables are included, not the full IFS output · Very large volume: about 103 GB per date and about 304 TB for the full archive · Entry description says grib2 but DOCS state GRIB Edition 1, so confirm the format before parsing · Cloud-optimised versions are separate products and are not this archive

Licence: see product README
Authentication: Public; anonymous HTTPS/S3 access via data.source.coop
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 14/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Verified via Source Cooperative API /api/v1/products/dynamical (public product, updated 2026-03-30).

Metadata observed 14/10/2026 · research sweep: manual-2026-10-15 (source.coop)