NOAA RTMA

The Real-Time Mesoscale Analysis (RTMA) is NOAA NCEP's analysis of near-surface weather conditions. It combines observations with a model background using two-dimensional variational assimilation.

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

Analyses

• NOAA RTMA analysis, virtualnoaa-rtma-analysis-virtual
  map-optimized · low-latency
  CONUS · all variables · 2.5 km
• NOAA RTMA-RU analysis, virtualnoaa-rtma-ru-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