Lamb Weather Types

Professor H.H. Lamb subjectively classified each day’s weather over the British Isles from 1861 to February 1997. The Lamb classification splits the prevailing synoptic conditions into one of ten categories; eight cardinal directional categories, and three other categories, cyclonic, anticyclonic or zonal. Since his death in 1997, an objective scheme to classify the daily circulation according to the Lamb weather typing scheme was developed by Jenkinson and Collison.