NOAA RRFS

The Rapid Refresh Forecast System (RRFS) is a National Oceanic and Atmospheric Administration (NOAA) National Centers for Environmental Prediction (NCEP) convection-allowing weather forecast model with a 3 km grid, built on the Unified Forecast System. The RRFS ensemble (RRFS ENS) adds five perturbed members to this deterministic forecast, and REFS combines both with HRRR into ensemble products.

NOAA RRFS is pre-operational, so expect changes to the model data and to the structure of this dataset.

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

Forecasts

• NOAA RRFS forecast, sub-hourly, virtualnoaa-rrfs-forecast-sub-hourly-virtual
  map-optimized · low-latency
  CONUS · all variables · 3 km
• NOAA RRFS forecast, 18 hour, virtualnoaa-rrfs-forecast-18-hour-virtual
  map-optimized · low-latency
  CONUS · all variables · 3 km
• NOAA RRFS forecast, 84 hour, virtualnoaa-rrfs-forecast-84-hour-virtual
  map-optimized · low-latency
  CONUS · all variables · 3 km

Data access

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