(NBCBayArea) - As rain fell on a Santa Rosa vineyard, a group of grape pickers squared off against nature. With an efficient swoop of each knife, a cluster of chardonnay grapes surrendered and tumbled into a plastic tub. It’s been a similar scene since last Thursday, when managers at DeLoach vineyards sounded the alarm over coming rain, and decided to start picking. “We’ve probably brought in a quarter of our harvest in the last three days,” said DeLoach winemaker Brian Maloney. “Usually that will be spread over a five week period.”