Provided here are daily historical weather pattern classifications covering the period from 1950 to 2020, where the observed weather patterns are valid at 1200 UTC daily. The observed weather pattern on each day is given as a number from 1 to 30, which matches up to the weather pattern numbers described in Neal et al. (2016). The method used to generate this updated classification is the same as used in Neal et al. (2016), with the exception of using ERA5 for both the daily pressure fields and daily climatology. The daily climatology is used to calculate the pressure anomalies before they are matched up to weather pattern definitions and uses ERA5 between 1951 and 2019. This daily climatology has also been filtered by applying a 3-, 15- and 31-day rolling mean. Column 1 of this dataset gives the date [YYYY-MM-DD] and column 2 of this dataset gives the observed weather pattern classification [#].

Weather code:1. Unbiased northwesterly2. Cyclonic southwesterly with a returning polar maritime airmass3. Anticyclonic southwesterly with a high pressure ridge over northern France4. Unbiased westerly5. Unbiased southerly with high pressure centred over Scandinavia6. Anticyclonic Azores high extension towards the UK7. Cyclonic southwesterly with a low centred wester-northwest of Ireland8. Cyclonic westerly with a low centred near Shetland 9. Anticyclonic north-northeasterly with a high centred near Iceland10. Anticyclonic west-southwesterly with a slight Azores high ridge11. Cyclonic with a low centred over southern UK 12. Anticyclonic southerly with a high over Poland13. Anticyclonic northwesterly with a high southwest of Ireland14. Cyclonic north-northwesterky with a low near southern Sweden15. Unbiased southwesterly, very windy in northwest Britain16. Anticyclonic south-southeasterly with a high east of Denmark 17. Anticyclonic east-southeasterly with a high over Denmark 18. Anticyclonic southwesterly with a high over northern France 19. Unbiased northerly with a low east of Denmark 20. Cyclonic westerly with an intense low near Iceland21. Cyclonic southwesterly with a deep low south of Iceland 22. Cyclonic southerly with a low west of Ireland 23. Unbiased westerly and very windy in the north24. Cyclonic northerly with a low in the North Sea 25. Anticyclonic northerly with a high centred in the Irish Sea 26. Cyclonic northwesterly with a low near Norway - very windy 27. Anticyclonic easterly with a high in Norwegian Sea 28. Cyclonic southeasterly with a low southwest of the UK 29. Cyclonic south-southwesterly with a deep low west of Ireland 30. Cyclonic west-southwesterly with a deep low southeast of Iceland