14 June 2013:
NOTICE ABOUT UPCOMING CHANGES
On 16 Jul 2013, NCEP will transition from the current operational Central Computing System (CCS) to the Weather and Climate Operational Supercomputing System (WCOSS). WCOSS does not have a "compress" function, so all Stage II/Stage IV files will be compressed with "gzip", and the file names shall be changed from file.Z to $file.gz ("gunzip" can be used to uncompress both types of files).
Note that 16 Jul is the projected date of the transition, and if that day turns out to be a critical weather day, the transition will occur earlier, before the start of the critical weather period. If you have a script that automatically grabs the data from NCEP's ftp site, you might want to make appropriate changes now. E.g. if you script currently has "mget ST2ml*.Z", you might want to change it to "mget ST2ml*"; if you have "uncompress ST2ml*", consider changing that to "gunzip ST2ml*".
For more information about the transition, please see http://www.nco.ncep.noaa.gov/pmb/changes/docs/wcosseval.shtml.
18 June 2013:
A set of sample Stage II/IV files produced on WCOSS have been placed on ftp://ftp.emc.ncep.noaa.gov/mmb/precip/st2-st4_wcoss_sample.20130616/.
NCEP/EMC Mesoscale Modeling Branch
GAPP/GCIP Project at NCEP/EMC