Hi is no question the barometric pressure cause flare ups. Major ones. I suffer so badly here in florida in the summer with the thunderstorms every afternoon that we had to leave and go up north. I could not take the additonal pain and endless flareups. When I got up north , pain level dropped and the frequency of flareups dropped to 20 %- huge difference. GOd willing I will never spend another summer in Florida. Just too too painful.