Hat blew off!? Really? That's what you call potentially too windy? "What's the point?" you ask. The game was invented on the windy shores of Scotland. Embrace the high winds as a bit of tradition that connects the game to its roots.
There are wind flags on our driving range. They are weighted and have numbers that suggest if the flag is blowing out, the wind is at least that number. I think they are 6, 12, and 24. When they first put them out a few Springs ago, I honestly thought they were made of a stiff material and were more like weathervanes because for weeks they all stood stiff -- meaning the wind never dipped even close to below 24 MPH. I could not figure out why there were three right near each other until one day the wind dipped below 24 MPH.
Now that the rules do not punish players for a ball blowing on the green after address, I would say if it is possible to get a ball to remain still long enough to putt it, it is not too windy. I have played on a buddy trip when the ball would not hold on two or three elevated greens. We created a "local rule" to keep things going.
That said, it seems like handicap padding to record those early spring rounds when the wind is a steady 30 MPH with gusts to who-knows-what. In June I am trying to break 80. In April, I often hope to break 100.