Northern California’s beauty is found even on a grey dreary day. El Niño’s influence was unmistakable during a recent quiet weekday visit in early January. The weather wet and cold, with periods of heavy downpour, still, undeterred, great friends treated Kathey and me to a wonderful day of wine tasting. What better pastime than to drive about Amador County’s Shenandoah Valley in the Sierra Nevada foothills, sipping classic zinfandels—originally from Croatia—and other varietals from Spain,