FF02,
That day at Coldwater was interesting. When we got to the lake, the wind was howling and the lake was covered by whiecaps. My buddy wasn't really to excited to fish, but after a long drive we gave it a shot.
The way things looked, we might be able to fish for a couple of hours at best.
About an hour in, the wind died down, the sun popped out and the lake went glass. The fun began shortly after that and lasted until we left at 6:00 in the evening. All day epic dry fly action.

We hit a big ant hatch at Coldwater one other time, except the weather was reversed. Great conditions in the morning followed by howling winds and blown off the lake by 1:00.
Hint - Both times were in mid May.