NOAA URMA

The Unrestricted Mesoscale Analysis (URMA) is NOAA NCEP's hourly analysis of near-surface weather conditions, incorporating observations received after the RTMA analysis.

dynamical.org republishes NOAA URMA as free, analysis-ready Icechunk Zarr archives — open them directly with Xarray, no GRIB wrangling or bulk downloads.

Analyses

• NOAA URMA analysis, virtualnoaa-urma-analysis-virtual
  map-optimized · low-latency
  CONUS · all variables · 2.5 km

Data access

• STAC catalog (browse) — the machine-readable source of truth.
• AWS Open Data Registry entry · browse the S3 bucket