With winter storms rolling in, “Sex and the City” author Candace Bushnell had a slick way to endure turbulence on a flight: whiskey. Jay McInerney posted a photo on Twitter of Bushnell holding a bottle of Jack Daniel’s on a plane with the caption: “Auntie Candace’s anti-turbulence formula. JD plus Xanax. Swig and repeat.” With Jack in hand and her seat belt fastened in the Twitter photo, Bushnell was ready for takeoff. The author headed to the Lyford Cay home of McInerney and wife Anne Hearst.