As I'm sure you've been noticing, I'm managing to update HadISD on a rougly monthly basis (the exact release date depends on other things in my schedule, but it tends to be around the second week of the month).
In January version 3.1.0.2019f was released, the final update to 2019 data (hence the "f"). I also ran the Pairwise Homogenisation Algorithm on the data to produce the homogeneity assessment information for this version.
Then, earlier this month (February), the new version 3.1.1.202001p was commenced. As this is a new set of monthly updates in 2020, the station selection code was re-run resulting in the addition of around 300 stations, making a total of just over 8400 in the HadISD. All other processing completed as normal, and this version is available at www.metoffice.gov.uk/hadobs/hadisd as usual. All data before 2020 is now frozen in this version, with only monthly appends, resulting in changes in the 2020 data.
As always, please let us know if you spot anything which doesn't look right or if you are having issues in obtaining the data.
