As I travelled across California this summer and autumn a few things proved consistent. Most vineyards – whether hillside or valley floor, North Coast, southern portions of the state or further inland – exhibited reduced yields via either smaller clusters, berry shatter or millerandage, and harvest came early. A warm winter followed by a chilly spring meant fruit set suffered. Reduced fruit set (this picture shows Cabernet clusters on Sonoma Mountain) and smaller berry size led to significantly smaller yields than usual, as well as greater concentration of colour, acidity, tannin and flavour. Weather conditions across the state, as...