This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
GEMPAK users, I have created an abbreviated data set from COMET case study #19 (Oklahoma City Tornado) as a sample for using retrospective data in GEMPAK. This data set can be downloaded by FTP from the gbuddy/data_sets directory as case19.tar.gz. To unpack the tarfile after downloading, run "gunzip -c case19.tar.gz | tar xvf -". This will create a directory called case19. To view the data in this case study tree: 1) exit out of ntl if it is already running 2) source your $NAWIPS/Gemenviron setup if you haven't already 3) cd to the case19 directory 4) execute "run_ntl_case19.csh" to launch the ntl application bar with environmental variables set for the case19 datatree. 5) When viewing data in NMAP2 or Garp, use the "Set Time" option to select the desired viewing time (This data set covers May 3-4 1999). The files in the data set follow the template names in the current GEMPAK 5.6.C distribution. For more information, see the README file in the distribution. Steve Chiswell Unidata User Support