Up here on the Great Plains we sometimes get some really strong straight line winds. Like 60 to 70 mph. I got caught in one of these with both locks in place. The side wind on the unit got under the rolled up awning in the center and managed to baloon it out. As soon as I stopped it went back in though.
Another time the rear lock wasn't locked securley and the rear of the awning balooned out and slipped the lock. I had to turn the unit away from the wind and had a heck of a time getting it back in. It did rip some attachment rivets loose on the rear of the awning. The Insurance paid for it but it was still quite a scare. That wind can really be wicked and the awning works like a sail with very great force. USE THOSE LOCKS and if the wind gets too strong, PARK for a while.
Another time I was backed up to the Ocean in St. Augustine when the wind came up in the middle of the night. I had the awnings out (foolishly) and the wind was rocking the whole motorhome even with the jacks down. I got up and managed to retract them with some difficulty.