weather-unified POC

What it does

Single REST API that returns forecast values from multiple models (GFS, ECMWF IFS, …) at a point, over a bounding box, or as a vertical profile. Variables are exposed in CF-standard names so the same call works across models.

Try it

// Output appears here

Endpoints

GET  /healthz
GET  /models                                       list models + variables
GET  /models/{model}/variables
GET  /point ?model=&var=&lat=&lon=&lead_from=0&lead_to=24
GET  /bbox  ?model=&var=&west=&south=&east=&north=&lead_hours=0&fmt=json|netcdf
GET  /profile ?model=&lat=&lon=&lead_hours=0
GET  /stac/search ?model=&from=&to=&bbox=&limit=
GET  /docs                                         OpenAPI spec UI

Training & inference (ML)

Download a kerchunk refs JSON via /refs/{model}, then read directly with xarray. Data flows from the source S3 bucket straight to your compute (no transit through this API).

import fsspec, xarray as xr

# small (~MB), describes how to read the GRIB2 files
refs_url = "https://5-189-137-60.sslip.io/refs/gfs"

fs = fsspec.filesystem(
    "reference",
    fo=refs_url,
    remote_protocol="s3",
    remote_options={"anon": True},   # NOAA Open Data, free egress
)
ds = xr.open_dataset(fs.get_mapper(""), engine="zarr", consolidated=False)

# everything cfgrib exposed is now a regular xarray Dataset.
t2m = ds["t2m"]                       # (step, lat, lon)
print(t2m.sel(latitude=48.85, longitude=2.35, method="nearest").values)

For ECMWF: /refs/ecmwf-ifs. Add ?init_time=2026-06-19T00 to pin a specific run.

Variables (CF names)

Surface: air_temperature_2m, dewpoint_temperature_2m, wind_u_10m, wind_v_10m, wind_gust_10m, mean_sea_level_pressure, total_precipitation, total_cloud_cover, low_cloud_cover, mid_cloud_cover, high_cloud_cover, cape, visibility, snow_depth, relative_humidity_2m.

Pressure levels (1000 / 850 / 700 / 500 / 300 / 250 hPa): temperature, u_wind, v_wind, specific_humidity, geopotential_height, vertical_velocity.

Status

Roadmap: ECMWF IFS validation, full 1-year GFS backfill, then HRRR, ICON-EU, AROME, WW3.

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Source: github.com/pdrion/weather_ruse