The HadISD dataset builds on NOAA NCEI's ISD dataset. There is work underway to replace the ISD with a new GHCNh (Global Historical Climate Network Hourly) product at NOAA, which will sit alongside the existing daily and monthly products under the GHCN brand.
a result of this, when the ISD is no longer operationally updated, the
HadISD will also cease to be updated. Once this happens (likely at the
end of this calendar year - the original notice from NOAA is already out
of date) we will produce a final version of the HadISD and leave this
available for some time on the home page. A version will also be lodged
at CEDA as usual. This will allow any monitoring occurring on a calendar-year basis to happen on a complete dataset.
due course we may look into the new GHCNh product to see whether we can
build a "HadGHCNh" product from that. Many of the quality control
tests are similar in this new GHCNh and so we will need to do some
careful investigation to ensure we are not erroneously keeping bad or
removing good values if we apply the HadISD QC suite on top of these
already QC'd data.
Given the issues with the buddy check described in a previous post, we intend to release two versions in early 2024:
- v331_202312p which follow on from other versions, with the buddy checks not being applied
- v340_2023f where we will reinstate the buddy checks.