Reva has said every half hour or so, but whenever it is between 0-30 minutes, Weather Eye tells me that the Dry/Rains are far off. When it is closer to the top of the hour, he says that the Dry/Rains are about to come.
I hate to thread-whore, but this could have been handled in the Q&A Thread. Stop by, have fun. There are alot of answers there that will be helpful to you now that you’re going back to do everything that’s optional.