data api · United States

NOAA GFS forecast

time-optimized · Global · variable subset · 0.25° · 0-384h (0-16 days) · every 6h Weather forecasts from the Global Forecast System (GFS) model operated by NOAA NWS NCEP, transformed into Zarr format by dynamical.org.

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What's in it

Data offered docs-verified: GFS weather forecasts (variable subset) · forecast lead times 0-384h (0-16 days)
Coverage docs-verified: Global
Resolution llm-inferred: 0.25° (spatial)
Update frequency docs-verified: every 6h
Formats docs-verified: Zarr
Access docs-verified: Public, no auth required (anonymous HTTPS/S3 via data.source.coop); licence not stated, see product README

Useful for

Use cases llm-inferred: Large-scale antecedent and forecast rainfall context for catchment-scale FRA screening, with the 0.25° grid used only as a coarse check · Forecast temperature and wind screening for weather-risk planning on temporary works or earthworks over the next 0-16 days · Weather-window planning for site surveys and fieldwork using the 6-hourly forecast cycle
Audience llm-inferred: hydrologists · flood consultants · civils planners · GIS analysts

Limitations

Constraints llm-inferred: 0.25° global grid is coarse for site-scale or small-catchment work · US NWS/NCEP model; not UK-tuned or UK-validated in the docs · Forecast skill declines with lead time, so 16-day outputs are indicative only · Variable subset only, so not every GFS field is available · Requires Zarr-capable tooling to read · Licence not stated in the docs; the README is a short pointer to external documentation

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 2026-07-24).

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