(Wines&Vines) - A harvest that veteran winemakers and growers called unlike any they had ever witnessed has come to a close, but the challenges are still fresh. That was the sense at the Napa Valley Grapegrowers’ Wine and Grape Expo held Nov. 16 at the Napa County Airport. Throughout the day, a broad range of industry insiders mingled at the trade show in a spacious hanger, listened to educational seminars and kicked the tires of massive viticulture equipment parked outside next to sleek private jets. Steve Price, a phenolics specialist with ETS labs and an Oregon Pinot Noir grower, began his seminar about grape sampling by saying that he just had to speak about tannin—or its pronounced lack—in the 2011 grape harvest. “We really haven’t seen anything like it in at least the past 15 years,” he said.