Friday, 22 July 2016


We have just released HadISD version  All plots and files should be on the website. This version  supersedes the preliminary version from earlier this year (v1.0.4.2015p).  There have been further updates to the ISD source data for the years 2007-10, 2012-13 and 2015 since the preliminary dataset was created in January, but no changes in other years. 

The raw data were downloaded on 17th June 2016, and processed over the last month  We have made no substantial changes to the codes which do the conversion to NetCDF files or the Quality Control suite, and so there is only the update in the version number is from preliminary to final.  

This version still contains 6103 stations, with 4050 passing the final filtering checks, down slightly from the 4060 in v1.0.3.2014f (see the HadISD paper Section 6).  The patterns of flagging are very similar to v1.0.3.2014f.  However if you find something strange, do let us know using the contact details on the HadISD website.  Please note the stations which are known to have issues are documented on this blog and on the website.

Fig.1 The fraction of all temperature records flagged for each station

Fig. 2 The fraction of all dewpoint temperature records flagged for each station

Fig. 3 The fraction of all sea-level pressure records flagged for each station

The Homogeneity information for this version is also available on the website using the same procedure (PHA) as outlined in Dunn et al, 2014.

As always, if you see anything untoward in the data or are having problems using it, please do not hesitate to get in touch.


The licence under which HadISD is released has been changed to a Non Commercial Government Licence.  Full details are on the HadISD websitePlease ensure you read and follow the terms of this licence before using the data.