. >> reporter: michael what barber vineyards said they should have been harvested a month ago. >> we to ride it out until we get the flavors and that -- the sugars where we want them. >> reporter: rain and rot are the latest challenges to this vintage, a cooler summer reduced yield with some vineyards down 60%. >> quality wise, i think it'll make a killer wine, we will just have a lot less. >> reporter: growers can spray the grapes if mold sets in to help control that rot. the question is how much damage was done. every vineyard is different so it's a hard question to answer. we probably won't know that until the harvest is in. napa ken pritchett. >> we see the sun is out and pretty much the day shaped up like you said. >> it started off with a few clouds, drizzle, then the sun came out and it's beautiful. actually throughout much of the day. when you get down to the avenue, the golden gate bridge, the tracker picking out the fog. there is the live camera and i asked the director to put this up. we are talking about a warming trend. remember what i said, i don't know -- if you watch