All the reanalysis datasets are from the NCEP-NCAR CDAS-1 Reanalysis . CPT provides access to monthly data for 1949 to date. The data are typically updated towards the end of the first week of each month. The following variables are provided:
- mean sea-level pressure (MSLP)
- geopotential heights at various pressure levels
- horizontal wind components at various pressure levels
If multiple pressure levels, and / or U and V wind components together, are selected, CPT will read these as multiple fields.
The reanalysis data are likely to be most useful in diagnostic (i.e., with Options ~ Data Synchronous Predictors switched on) rather than predictive analyses.