After big rain, wine country dodges a bullet
This week’s forecast of warm temperatures, dry, sunny weather and above all gusty breezes is made to order for Northern California winegrowers who got a scary soaking on Saturday morning.
Precipitation records fell all over the place. Oakland Airport got nearly an inch of rain, smashing the old record. Mount St. Helena, at the head of Napa Valley, got an inch. As usual, the first rainfall of the season caught drivers unaware: there were accidents everywhere. This was the region’s first real storm since last January, and it came earlier than heavy rain usually comes.
What impact did the rain have on the grapes? As usual, I asked my Facebook friends. Here’s what they said.
While the drops were still falling, the mood was gloomy. “As a farmer/winemaker, [I am] not happy,” said a Spring Mountain vintner. “Scared to death for Petite Sirah,” replied a Sonoman, concerned about the potential for rot in that varietal’s tightly-clustered bunches. A Sonoma Coast winemaker wrote, “Glad I don’t grow Petite. Most Sonoma Coast Pinot is in the barn. All the Bordeaux always have to ride a storm before they get picked, them’s the rules, right?” Right. From down south in Paso (by which the storm had largely petered out), came this reply: “It’s not good for grapes when this happens.”
As morning rain gave way to parting clouds and even warm sun by Saturday afternoon, vintners got more perspective, and were able to put the drenching into context. “Rinse the dust over the canopy to give the vines a boost!” wrote a Sonoma vintner. A Rutherford winemaker predicted, “What we will do is leaf the cluster zone to favor air flow and dry it as fast as possible,” referring to the classic method of allowing mold-producing moisture to evaporate. A Pinot grower with vineyards in Sebastopol and the Anderson Valley must have seen the long-range forecast when he wrote, “It’s been quite windy this afternoon, and is supposed to continue to be very windy for the next couple days…that should help the situation a lot.”
What is that long-range forecast? Here’s from yesterday’s Napa Valley Register. Nice to see all those yellow suns lined up. Warm, sunny weather for at least the next nine days.
So the rain was unusual, and caused some pulse-thumping moments, but should end up being largely meaningless. The only one of my Facebook friends I’ll quote by name here is Mitch Cosentino, at PureCru Wines, whose long reply aptly sums up the situation. “This is my 34th harvest. I was more concerned about my tomatoes in my garden. We had 0.8 in Napa city area. After the rain, it was pretty windy before sundown (which was good). There should be no effect at all on Cab Sauv or Cab Franc. In fact it could help show down and spread out the harvest a bit because everything was getting a bit jammed up. Pinots should be fine. People in Burgundy would laugh at anyone with any concern with one day of rain. If there is any really ripe Sauv Blanc still out there that could have some issues. Ripe Zinfandels could have problems but not likely with it being only one day and breezy mid 70s predicted for the next few days. We have had a beautiful growing season one day is just a day off. Everyone relax, it is going to be a great vintage.”