Millions of digitized historical sea-level pressure observations rediscovered

Millions of sub-daily sea-level pressure observations taken between 1919-1960 over the\ud British and Irish Isles were transcribed from paper records in the early 2000s but were not\ud published and subsequently forgotten. A chance discussion led to the rediscovery of the\ud transcribed data and 5.47 million observations from 160 locations are now made available,\ud although the data have not been fully quality-controlled. Much of the data are 3-hourly,\ud allowing for detailed examinations of synoptic weather variations for this region and time\ud period, and will be invaluable for constraining future reanalyses. We illustrate the value of\ud the data using a stormy period during October and November 1928 and discuss the remaining\ud quality-control issues.