Northwest wine grape growers expect this week's cold weather to do some damage to their vineyards. But it’s not clear yet how much of next year’s fruit might be affected.
Deep cold on wine vines isn’t good. But several factors determine just how bad it is. There’s the cold itself, and how long it lasts. There’s the elevation, colder air tends to settle in lower valleys. Then, there’s the variety of grape -- is it German tough or less-cold hardy Mediterranean?
Tom Waliser manages some of the best-known vineyards in the Northwest. One of them, Pepper Bridge, sports a comb-over of snow. Waliser says every so often he has to cut vine trunks back to the ground, and that means it will be several years before a fruit harvest comes again.
“It’s a major setback," says Waliser. "It’s not only economical, but it’s hard to get motivated for the next year when you know you don’t even have a crop.”
Waliser says he won’t know how bad the damage is for about a week after this cold passes.