Migrate from data.dynamical.org

data.dynamical.org stops serving datasets after August 31, 2026. The datasets remain public and continue updating; only this access route goes away.

Replace each hard-coded https://data.dynamical.org/.../latest.zarr URL with one of the supported access patterns below. Both resolve the current repository from our STAC catalog, so your code does not need to track storage locations or version changes.

Recommended: dynamical-catalog

Use Python 3.12 or newer and install dynamical-catalog>=0.7.0. Pass the dataset ID from its catalog page.

import dynamical_catalog

ds = dynamical_catalog.open("noaa-gfs-forecast", chunks=None)

Direct STAC and Icechunk

Resolve the icechunk-https asset from STAC each time your application opens a repository. Do not copy and permanently hard-code the asset URL.

import icechunk
import pystac
import xarray as xr

catalog = pystac.Catalog.from_file("https://stac.dynamical.org/catalog.json")
collection = catalog.get_child("noaa-gfs-forecast")
asset = collection.assets["icechunk-https"]

repo = icechunk.Repository.open(icechunk.http_storage(asset.href))
session = repo.readonly_session("main")
ds = xr.open_zarr(session.store, consolidated=False, chunks=None)

Have an agent do it

Paste this into a coding agent running in your repository.

Replace every data.dynamical.org URL in this repository with dynamical.org's
supported access, and leave no hard-coded storage locations behind.

Context to read first:
- https://dynamical.org/llms.txt for current access patterns and dataset IDs.
- https://stac.dynamical.org/catalog.json is the source of truth. Confirm each
  dataset ID against it rather than guessing.

Rules:
- A legacy URL maps to a dataset ID by dropping the host and joining the path
  with hyphens: data.dynamical.org/noaa/gfs/forecast/latest.zarr ->
  noaa-gfs-forecast. Exception: /noaa/gfs/analysis-hourly/ is retired, use
  noaa-gfs-analysis.
- Prefer dynamical_catalog.open("<dataset-id>"). It needs Python 3.12+ and
  dynamical-catalog>=0.7.0.
- If a new dependency is not an option, resolve the "icechunk-https" asset from
  the dataset's STAC Collection at open time. Do not hard-code the asset href,
  the S3 bucket, or a version number.
- Drop any ?email= query argument. It is no longer used.
- Opened datasets are Icechunk 2 repositories read through xarray. Chunking and
  variable names may differ from the legacy archive, so check any code that
  assumes a specific chunk shape.

Report every URL you could not map, and every place a dataset ID had to be
chosen rather than derived.

What changes

Opening requires Icechunk 2 and Python 3.12 or newer.
The public STAC Collection is the source of truth for the current repository.
Dataset IDs replace data.dynamical.org paths; dimensions and variable coverage are documented on each catalog page.
The optional ?email= query argument is no longer used.

Help

If the replacement does not cover your access pattern, email [email protected] with the data.dynamical.org URL, variables, spatial subset, and time range you use.