Meteorology / Analysis Data FTP / ARL Current

The ARL web server contains several meteorological model data sets already converted into a HYSPLIT compatible format on the public directories. Direct access via FTP to these data files is "hardwired" into the GUI. The data files are automatically updated on the server with each new forecast cycle. Only an email address is required for the password to access the server. The "FTP menu" is locked until the FTP process is completed, at which point a message box will appear indicating the file name that was just transferred.

Pre-processed forecast data are available for NOAA's NAM (formerly ETA) model at 40-km resolution covering North America and the AVN run of the GFS, on hemispheric projections (northern and southern) at 191-km. The archive consists of a series of analysis (0-hour initialization) and short-time (+3 hr) forecast files that have been appended to each other to create a continuous data time series for the previous 48 hours from the most recent available forecast cycle.

Note that NOAA NCEP models are run at much higher spatial resolution than what is archived in a HYSPLIT compatible format on the ARL server. If calculations using higher resolution data are required, then the original NDAS (formerly EDAS) or GDAS (formerly FNL) GRIB files must be obtained and converted as described in the documentation.



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