As of August 29th 2025, the ISD dataset has stopped receiving updates. Therefore the HadISD can no longer append new data to the end of the station time series.
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| Snapshot on 4th September 2025 of this page: https://www.ncei.noaa.gov/operating-system-upgrade-outage |
Given the timing of this change, we have released v342_202508p as normal as a standard "preliminary" version using the station lists from January 2025. In due course, we shall see if or how best to release a 2025f version.
But for now, the HadISD dataset is coming to the end of its run. Version 1.1.0.2011f was released in 2012, as an annually updating dataset covering 1st January 1973 to 1st January 2012 with 6103 stations. Version 3.4.2.202508p is a monthly updating dataset covering 1st January 1931 to 29th August 2025 with 10,269 stations.
As a replacement, the Global Historical Climatology Network hourly (GHCNh) has built on the successes and developments within HadISD. GHCNh is still under active development, and so will improve over the coming years to fill the gap that ISD/HadISD will leave.
Dear Dr. Dunn, many thanks for your indispensable contribution to open data in hydro-meteorology! We are looking forward to using GHCNh as a comparable substitution to HadISD, but hope that you and your team will continue to contribute to the Had- version as one of the most reliable data sets for model verification. Thank you!
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