GHCNM, V3, status file (users can use this file to determine overall current status, including information related to previous changes and errata). DISCLAIMER: The status file does not record every possible change that may have occurred from one version to another. This would be impractical for a variety of reasons. Therefore if a user is interested in discovering every possible difference between two different file versions, they will need to construct their own program to determine all possible changes between the file versions. ******************************************************************************** 09/19/2019 GHCNM version 3 is no longer operational (TAVG, TMAX amd TMIN). Users should use GHCNM version 4 for TAVG, found here: ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v4/ In addition Version 4 TMAX and TMIN is under development and will be available in the future. ******************************************************************************** 07/19/2017 New De Bilt (station="63306260000") time series (per KNMI recommendation) added from KNMI (source=https://climexp.knmi.nl/data/ilabrijn.dat) into tomorrow's processing run (valid for 07.20.2017 [and later] processing run) ******************************************************************************** 03/11/2017 User feedback indicated a problem with some mean temperature data for select stations in Ireland. The problems were traced to a particular data source (MCDW), and for the time being until that source is corrected, the data are now being sourced to the UK Met Office "Climat" data ("K" source flag"), which are believed to be the correct values. The data changeover to the UK Met Office has occurred, but the source flag ("K") for the corrected values was inadvertently left out. Those source flags should be added within the next production cycle. ******************************************************************************** 06/09/2015 GHCNM v3.3.0 is now operational, effective 06/09/2015. ******************************************************************************** 05/28/2015 GHCNM version 3.2.2 will be replaced by version 3.3.0 in early June, 2015. Information on this change is available in Technical Report GHCNM-No15-01. ******************************************************************************** 07/14/2014 On or around 06/06/2014, there was an ingest problem with the "C" source data, (unpublished MCDW), and this caused a signficant reduction of data from that source. However, much of the data were still available through an alternate source (UK Met Office, "K" source flag). The ingest problem was resolved on 07/10/2014, and the expected frequency of "C" source data was restored. ******************************************************************************** 10/17/2013 Government operations have been restored, and regular monitoring of GHCN-Monthly will now resume. During the shutdown of government operations, some ingest of recent international data were not received. These data should be restored with the next processing cycle (e.g. 10/18/2013). ******************************************************************************** 10/01/2013 During the shutdown of government operations, GHCN-Monthly will continue to update automatically, but will not be monitored by the GHCN-Monthly team. We will also be unable to answer questions submitted to NCDC.GHCNM@noaa.gov until after government operations resume. ******************************************************************************** 08/03/2013 Version 3.2.2 was released on 8/3/2013. This minor update to GHCN-M includes several bug fixes, which involved data feed transmission issues, improving source code efficiency, accommodating changes in GHCND, and data improvements. ******************************************************************************** 03/21/2013 Station 12861497000, NEMA was believed to have incorrectly transmitted data for February, 2013. These data have been removed and as soon as corrections become available and can be verified they will be reinserted into the dataset. ******************************************************************************** 03/20/2013 Mongolian station data for February, 2013 were retransmitted with incorrect data sometime on or around March 12, 2013. These data have been removed and as soon as corrections become available and can be verified they will be reinserted into the dataset. ******************************************************************************** 02/15/2013 Version 3.2.1 was released on 2/12/2013. This minor update to GHCN-M includes the use of updated data to improve quality control and correction processes of other U.S. stations and neighboring stations in Canada and Mexico. It also includes a correction to an omission in the USHCN Time of Observation bias correction process that had been present in version 3.2.0 since October 22, 2012. The algorithm that was specifically designed to correct for observing time changes based on station history information was omitted from the USHCN bias correction process. The Pairwise Homogeneity Algorithm continued to function and corrected most of the time of observation issues, which minimized the effect of this processing omission. Additional details are available at http://www.ncdc.noaa.gov/sotc/national/2013/1/supplemental/page-5 . ******************************************************************************** 09/06/2012 GHCNM v3.2.0 is released with various software related bug fixes. More detailed information concerning the v3.2.0 software changes can be found here: ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/techreports/Technical%20Report%20NCDC%20No12-02-3.2.0-29Aug12.pdf ******************************************************************************** 02/07/2012 GHCNM v3.1.1 is released with changes in scripts due to asynchronous execution problems. Also added ability to add new stations automatically when their period of record increased enough to process and improved testing when not enough neighbors to estimate adjustments. ******************************************************************************** 11/04/2011 GHCNMv3.1.0 is released with several corrections revealed by Daniel Rothenberger and a reworking of internal arrays for more efficient operations. Tech Note: Technical Report NCDC No12-01-Distribution.pdf Is available at: ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/techreports/ ******************************************************************************** 05/12/2011 Maximum (TMAX) and Minimum (TMIN) temperature data are now being posted to ftp. However, these data will probably only be updated weekly as opposed to daily for mean temperature (TAVG). ******************************************************************************** 05/02/2011 GHCNM v3.0.0 is officially released. The "beta" status is removed. Users may notice for the next week or so a few dangling references within dataset files that still contain the word "beta" (including documentation and web site). We are working to remove those references. ******************************************************************************** 04/12/2011 GHCNMv3 "latest" files are being refreshed daily on the NCDC FTP. ******************************************************************************** 04/08/2011 in anticipation of the Government shutdown, updating the ghcnm.latest.* files has been suspended ******************************************************************************** 04/01/2011 interuption in FTP server access caused data flow to fail. GCHNMv3 stopped working. ******************************************************************************** 03/17/2011 current estimated plus adjusted (ghcnm.latest.qae.tar.gz) was removed from posting. Please contact team (ncdc.ghcnm@noaa.gov) for dataset. ******************************************************************************** 02/02/2011 added "Colonial Era Archive" data (source flag="J") to a little over 150 existing stations. ******************************************************************************** 01/2011 Added "World Weather Records" (WWR) data to existing WWR already carried through via GHCNM v2. WWR are now identified by source flag="W". ******************************************************************************** 12/17/2010 two spatial qc checks ("S" and "T") eliminated and replaced with spatial check used in v2 (now set to "S" qc flag), documentation updated to reflect changes. ******************************************************************************** 12/16/2010 initial build from GHCNM v2, now occurs using 'clone' file, so previously qc'd v2 data (formerly set to missing), are carried through as non-missing, but subjected to new v3 qc suite. ******************************************************************************** 11/18/2010 "stnelev" and "grelev" fields should now both be in meters. Previously, some stations were reported in different units (e.g. dekameters vs. meters).