At the 2005 Hobie 17 North American Championships held at Dewey Beach, Delaware; we had a squall come through between races. It looked like a black wall speeding over the water at over 40 knots (measured at the Yacht club). Over 30 competitors had just enough time to park our boats and ride it out. No one capsized. Racing continued as soon as the squall passed. Matt Bounds can corroborate this story (he won).