Monday, 25 January 2016


We have just released HadISD version  All plots and files should be on the website This update extends the coverage of the dataset to the end of 2015 (31 December at 2300 inclusive).  It remains a preliminary dataset as there could still be further updates to the ISD dataset in the next few months.  We hope to do a processing run for the final version some time around Easter (to create 

The raw data were downloaded on 7th January 2015, and processed over the subsequent days.  There have been changes to all of the raw files in 2012-2014 as part of the normal ISD update process  We have made no substantial changes to the codes which do the conversion to NetCDF files or the Quality Control suite.  Hence the version number has only incremented by 0.0.1 and the year.  Any updates to these systems will be included in the future HadISD.2.0.0. 

This version still contains 6103 stations, with 4049 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.

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