As the ISD is still currently being updated, we have made the first annual update for 2025, v3.4.2.202501p. As usual, we've re-run the station selection and now there are 10,276 stations in the dataset.
This update was run on a new compute solution, but a comparison to a version run on the old one showed only very minor changes for the Distributional Gap and Climatological checks - which are likely to have arisen in the Gaussian curve fitting for these tests. Only a few stations have moved flagging categories in the summary plots, and only for these tests and those which assess overall flagging rates (month-clearing). We have therefore accepted the migration as successful with no changes made to the underlying code.
