OK. It’s been a lot. It started on Friday and now on Monday morning, it’s still damp and grey. It’s not good for the grapes, but it’s not disastrous. Most vineyards already had a good amount of their whites in and reds (except for some pinot noir) usually does not get picked until mid October.
The ground was pretty dry, and sandy, and can soak up the water. What can happen is the rain and wind can knock bunches off the vines. Which means fruit loss, which means money loss.
The growing trend toward more severe leaf pulling and green harvest has left many vineyards with bunches that have withstood this latest assault by Mother Nature.