Last night, a strong cold front passed over the Florida Keys, temperatures dropped like a stone and the wind suddenly went from nearly calm to 62 MPH, which was recorded at the local airport. I'm sheltered in the canal, and had the added benefit of a 75-foot motor yacht partially blocking the wind. However, a friend that is on a mooring ball in the middle of Boot Key on a 41 Hunter with a fin keel said the wind ripped through the area, his boat swung wildly on the ball, swinging 180 degrees, then whipped back in the opposite direction and heeled over sharply. He experienced a wild 30 minutes while the weather went nuts, followed by torrential rains that put four inches of water in my inflatable dinghy. Ironically, the boats in the harbor with full keels appeared to fairly stable.