By Lenn Thompson, Executive Editor A month ago, Hurricane Earl threatened East End vineyards with its high winds and rain — only to pass off to the east and have little impact on developing grapes. Now, an un-named line of storms is threatening to drop several inches of rain on local vineyards and bring wind gusts of up to 60 mph. Most of the white wine and sparkling wine grapes have been picked. As have most of the grapes intended for rose production, so those wines won't be affected by this storm system, but 2010 red wines could be. That…