We have not received precipitation since the 21st, but every night since then has been humid. Dews that formed 3-4 AM stayed until 9-10 AM in some days. Once again, these conditions favors downy mildew spore development.
If your vines are covered with a previous application, you do not need to worry about it, but if not (say, the last application was more than 10 days ago, or you had more than 1.5-2 inches of rain since the last application), then you may want to consider a protective application before next thunderstorm hits, which may happen in the next few days. We are almost through with the critical period, though!