The NOMADS data server address has been changed. The old address
has been changed to
Please update any bookmarks or scripts that use the NOMADS data server.
NOTICE of RTOFS Change:
Changes were made to operational RTOFS starting with the
0504202100 Z cycle to correct for a drift in assimilation of Absolute
Dynamic Topography (ADT) caused by changes in data processing.
Model nowcast/forecast data from Global RTOFS is available as
Network Common Data Format (NetCDF)
Open-source Project for a Network Data Access Protocol (OpenDAP)
from the following locations:
NCO Production FTP Server (NetCDF)
latest run only
NCO Operational NOMADS
latest + 1 day archive
Note: RTOFS OpenDAP on the NOMADS server is not operational at the
present time. Full file downloads are still available.
NetCDF and OpenDAP are common data formats and viewers/decoders are
available from a number of vendors and organizations.
Data is available as individual NetCDF files, OpenDAP urls, and
regional GRiB2 files.
Information on the file naming conventions and file contents can be found
Note that the NOMADS OpenDAP urls aggregate all of the nowcast and forecast times into
two urls (forecast, nowcast) for each type of file (2ds diag or 2ds prog surface files, 3ztio, 3zsio,
3zuio, and 3zvio full-volume data).
For analyzing the
model data in MATLAB® we recommend the
NCTOOLBOX for MATLAB. NCTOOLBOX can read NetCDF, OPeNDAP, HDF5, GRIB,
GRIB2, HDF4 and many (15+) other file formats. The complete list of formats
Notes on processing Global RTOFS data
The interpolated and native global horizontal grids are very large
(3298x4500 native, 14.8 million grid points), (2160x4320 interpolated, 9.3
million grid points). Loading and mapping a single layer of the full global
grid takes a considerable amount of memory.