I have never heard them mentioned as a final sign, but surely, they have some impending warning.
We have been drenched with some heavy rain. The course is currently closed until the rain stops. The greens are saturated and have significant areas with standing water. The rain definitely puts us behind schedule. We like to have the course perfect for memorial day, as it really signifies the start of our season.
Look for the course to open 1 to 2 hours after the rain stops today. I sound naively optimistic don't I?
I would include a prediction of when that will be, but the radar has taken on the appearance of a green lava lamp where the yellow blobs simply change size and move back and forth. (yes, it is a stalled low pressure system sitting on the lake)
Don't forget your umbrella,