(Wines&Vines) - Amy Warnock opened the Napa Valley Grapegrowers' harvest press conference with a line that brought a laugh from all attending: “This will be the best harvest ever!” Growers and wineries worldwide are famous for issuing such yearly proclamations, no matter what the conditions. This time, however, Warnock may be right. Conditions have been nearly perfect for cultivating premium winegrapes.