‘I can’t remember a hotter weekend in September, and I’ve lived in Northern California my entire life,’ said Rob Davis, winemaker at Jordan Winery in Alexander Valley, Sonoma County.

The heatwave was the final event in a growing season defined by extreme, erratic climatic conditions. Winter saw heavy rainfall, while June met with an unexpected hail storm. But is the California 2017 vintage cooked?

Davis reported ‘minor sunburn’ on some Jordan Chardonnay grapes but added that most of his crop was back on-track after temperatures fell back.

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