Image from longboardvineyards.com
This is a couple weeks early due to the relatively dry and warm weather. Lots of plants are early this spring, not just the grapes.
This means nothing as far as the quality or quantity or wine grapes this year. What it does mean is a long frost protection season as the tender shoots can be damaged by cold nights. The most common means of protecting the vines is with wind machines to move the air or with sprinklers.
The good news is we're in a week long rain storm that should delay bud break in other vineyards and will supply much needed water.
The vineyard folks are pretty much on constant watch from now through October.
The seasonal cycle looks something like this (dates approx):
Bud break late March
Bloom June 1st
Fruit set June
Verasion late July-early August