# HRRR Zarr — cloud-native Zarr conversion of NOAA HRRR on AWS Open Data
# Maintained by Synoptic Data (formerly MesoWest). Separate from the raw
# GRIB2 archive at s3://noaa-hrrr-bdp-pds/.

title: "HRRR Zarr (AWS Open Data)"
bucket: s3://hrrrzarr
homepage: https://registry.opendata.aws/noaa-hrrr-pds/
operator: NOAA NCEP / Synoptic Data (Zarr conversion)

auth:
  mode: anonymous

egress_cost: free
region: us-west-1

# Path pattern (no STAC API — direct S3):
#   s3://hrrrzarr/sfc/{YYYYMMDD}/{YYYYMMDD}_{HH}z_{product_type}.zarr/{variable}/
#   s3://hrrrzarr/prs/{YYYYMMDD}/{YYYYMMDD}_{HH}z_{product_type}.zarr/{variable}/
#
# product_type: anl (analysis), fcst (forecast)
# sfc/: surface and near-surface variables (2m temp, precip, wind, etc.)
# prs/: pressure-level variables (upper-air analysis)
# Archive begins 2014-07-30; updated hourly with ~1–2h lag.

notes: |
  Zarr-converted HRRR for cloud-native access. Each variable is a separate
  Zarr array under the run's .zarr/ prefix — avoids GRIB2 decoding overhead.
  Coverage: CONUS + Alaska (separate domain). 3km grid. 18-hour forecasts
  (analysis + 18 forecast hours per run, 24 runs/day).
  No STAC API — access via direct S3 path construction or kerchunk index.