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Releases: Unidata/gempak

Unidata Community GEMPAK 7.15.0 Release

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This release merges upstream NCEP NAWIPS 7.15.0, whose CHANGELOG includes:

  • Bug fixes and other issue resolutions.
  • Cumulative revisions to NAWIPS data tables to support maps/bounds,
    surface stations, tropical, and other routine periodic updates.
  • Integration of compiler, and certain changes required to support the
    WCOSS supercomputer and RHEL 8 Operating System transition projects.
  • Updates to Volcanic Ash Advisory user interface to support the NESDIS
    Satellite Analysis Branch.

This release also includes the following GEMPAK Community changes:

  • More dynamic setting of NAWIPS environment variable on bash (#85).
  • Update MRMS Grib Tables to v12.1 (#89).
  • Continued cleanup of bad previous merges that overwrote Unidata
    local table modifications.

Unidata Community GEMPAK Release

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This release signifies the desire for the community to make releases at a faster
cadence than verbatim tracking NCEP NAWIPS releases (#74). We will continue
to attempt to merge any upstream NCEP NAWIPS releases, but will attempt to add
additional functionality here.

Bug Fixes

  • The install4j Java vulnerability is "addressed" by simply removing the offending
    jar file content, which is generally unused by the Unidata Community (#69).
  • The release of 7.14.0 has a number of issues with included GEMPAK tables
    with Unidata modifications over-written by the NCEP NAWIPS releases (#70). There
    may still need to be some work done in this area, but things are much closer now
    to back to normal.
  • @sgdecker kindly provided fixes for a couple of edge cases (#44, #46).


  • Developer experience improvements were made with some cleanups to the git
    repository (#78) and implementation of Github Actions for CI (#65, #57).
  • GEMPAK now supports the newly added "Super-Res" NEXRAD Level III products (#73).

Unidata GEMPAK 7.14.0 Release

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Merge pull request #54 from akrherz/merge7.12.1

Merge NCEP NAWIPS 7.14.0

GEMPAK 7.5.1

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Release Notes

  • Supports GOES-16/17 ABI imagery in NetCDF 4 format
  • Fixed build of program dctama


GOES16 and GOES17 ABI products are distributed in NetCDF4 formatted files, and GEMPAK as of release 7.5.1 can now read and display these products in their native formats (it is no longer needed to convert netCDF to McIDAS area format to display in GEMPAK).

For Full Disk and CONUS sectors, GOES16 and GOES17 ABI products are sent across the Satellite Broadcast Network as tiles, each contributing to a "mosaic" of a full sector scan. The Unidata Program Center has provided an alternate data feed in which all tiles are "stitched" together (thanks to the program ldm-alchemy).


To request these stitched images, add the following request line to your ldmd.conf:



The following pattern action

NIMAGE     ^/data/ldm/pub/native/satellite/GOES/(.*)/([^/]*)/([^/]*)/([0-9]{8})/GOES(16|17)_([^/]*)_([0-9]{8})_([0-9]{4})(..)_([^/]*).nc4
        FILE    -close  data/gempak/images/sat/\1/\2/\3/\3_\7_\8

will create files such as :


for each of the 16 ABI channels (here the environmental variable SAT = /data/ldm/gempak/images/sat/) and each available sector (e.g. CONUS above).

NMAP2 Display

The above pqact.conf entry will write images to directories in $SAT, which are then selectable in NMAP2 > New Data Source > Image

GOES16 Full Disk



GOES16 Mesoscale-1

GOES16 Mesoscale-2

GOES17 Full Disk*

  • as seen above there is still a map projection error for GOES17 Full Disk images.




GOES17 Mesoscale-1

GOES17 Mesoscale-2

GEMPAK 7.4.5

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This is a minor update release with the following changes:

GEMPAK 7.4.3

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Release Notes

  • Full support for GOES ABI fixed grid projection McIDAS AREA format (UNIWISC)
  • New AWIPS lutfils for GOES 16 IR and WV channels (
  • Corrected a bug in 7.4.2 snow squall warnings which caused dcwarn to generate false FFW warnings
  • Updated zlib 1.2.6 -> 1.2.8
  • Updated HDF5 1.8.0 -> 1.8.15
  • Updated netCDF 4.1.3 ->
  • CloudGEMPAK updated to GEMPAK 7.4.3

GOES-16 LDM Pattern Actions for GEMPAK

# ---------------- GOES-16 Image Sectors ----------------
UNIWISC ^pnga2area Q. CNC(..) (.*) (.*)_IMG (.*)um (.*) (........) (....)
        FILE    -close  data/gempak/images/sat/\3/CONUS/Ch\1-\4/\4_\6_\7
# Full Disk
UNIWISC ^pnga2area Q. FDC(..) (.*) (.*)_IMG (.*)um (.*) (........) (....)
        FILE    -close  data/gempak/images/sat/\3/FullDisk/Ch\1-\4/\4_\6_\7
# Meso1
UNIWISC ^pnga2area Q. M1C(..) (.*) (.*)_IMG (.*)um (.*) (........) (....)
        FILE    -close  data/gempak/images/sat/\3/Mesoscale1/Ch\1-\4/\4_\6_\7
# Meso2
UNIWISC ^pnga2area Q. M2C(..) (.*) (.*)_IMG (.*)um (.*) (........) (....)
        FILE    -close  data/gempak/images/sat/\3/Mesoscale2/Ch\1-\4/\4_\6_\7


GOES-16 Full Disk

GOES-16 Mesoscale Sector

GEMPAK 7.4.2

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  • New GOES fixed grid projection McIDAS navigation for ABI imagery.
  • New GOES ABI lookup tables (colormaps).
  • gdpvsf added back to release after fix for max number of grids to avoid memory reallocation error.
  • Added polygon-based Snow Squall Warnings Product (nwx, nmap2, gpmap)
  • Various other table and map updates from NCEP NAWIPS 7.4.2.

Note that GOES-16 imagery is NOT LIVE yet on the UNIWISC feed (as of April 10, 2018). There will be a separate announcement about the distribution of GOES-16 products in AREA file format.

Linux Binaries

GEMPAK 7.4.1

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Release Notes:

  • Grib2 table updates for moisture, momentum, mass, radiation, hydrology, cloud/aerosol, more.
  • Removed repetitive dcmetr log messages.
  • Pattern actions in ldm/etc/templates/pqact.gempak_decoders_grid for various NamDNG grid and the National Blend of Models.
  • Alias/mod_res updates, increased max grids in file for gfs, nam, National Blend, SST, URMA, others.
  • Bug fix for AWIPS grid retrieval in scripts/python/

Linux Binaries

GEMPAK 7.4.0

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Release Notes:

  • Increased nex2img maximum GINI size
  • Maps and bounds file operational updates from NAWIPS 7.4.0
  • Grib table and pqact updates for 2.5km GFSMOS
  • Fixed G-AIRMET issues when more than 20 points are drawn below the centroid of a smear or snapshot polygon
  • Bug fix in ensemble diagnostic function ENS_CVAL
  • Added new GEMPAK grid diagnostic function: neighborhood functions, developed by SPC
  • Updated HYSPLIT restore files for parameter name changes
  • Fixed nmap2 and gdplot2 bug where program was unable to display global wrapped CED grids for subareas including poles
  • Fixed prob2cat bug that occurs while composing convective outlook, and bug where lines are drawn outside international boundaries
  • Fixed dccsig when handling isolated or lines of thunderstorms
  • Linux binaries built with Docker containers on Travis CI

Linux Binaries

GEMPAK 7.3.2

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  • gdradr support for dual-pol products.
  • dcgrib(1) support for NOAAport NAM212.
  • g2vcrdwmo6.tbl, g2varswmo0.tbl symlink.
  • gdplot fix for missing titles.

64-bit RPM for CentOS/RedHat