Mother Nature framed the 2010 growing season with above-average precipitation in Napa Valley, with Spring rains ending in May and resuming in late October. The season was slightly cooler than normal, testing the skills of vineyard managers as they sought to speed up the ripening process. The harvest season was brought to a quick close in late October by an advancing Pacific storm system. Overall, tonnage was off by as much as 20% but vintners were pleased with the quality of the crop.