There are many reasons to love wine. Part of the allure is the fact that no two wines are perfectly alike. They can never be replicated due to a simple fact- weather. While you may produce the grapes from the same vineyard, using the same winemaking techniques, weather patterns will always change from year to year. As a result, many of the most famous wines are rated by vintage even within a wineries own collection. Below is a synopsis of the past vintages here in the Napa Valley.