So why are we talking about frost during harvest? Because -- unusually -- the wind machines have been running in broad daylight for the past couple of days. We've had a few days of rain, much dreaded by growers with rapidly ripening but not quite ready to pick, fragile, expensive winegrapes. In the absence of a typical warm breeze wafting through the Napa Valley that would naturally dry out the vines, the gentlemen have started their engines to protect the quality of their precious grapes.
In Bordeaux, where harvest rain is fairly common, they use helicopters.