Two years ago, on a century charity ride. I'd gotten a few miles off-course and didn't realize that they'd closed the ride due to tornado sightings and were sending out vans out to collect riders. I don't know what the wind speed was, but in a matter of seconds it changed from gusts to where there were pieces of trees flying across the road - big limbs with branches, not just sticks - and the crops to my right were flat against the ground from the wind. There didn't seem to be a safe place to stop so I just kept going, finally realized that I'd missed a turn, turned around and went back through it. On the return leg to get back on course it had thankfully toned down to reasonable storm level winds, but a torrential downpour.