On Sunday morning, flights to Phoenix Sky Harbor International Airport were temporarily halted due to adverse weather conditions, including low visibility and high winds. The Federal Aviation Administration (FAA) initiated a ground stop at 8:15 a.m. MST, prompted by concerns from the National Weather Service about winds reaching speeds of 25 to 30 mph due to high pressure over the Southern Plains. The ground stop, initially expected to last until 10 a.m., led to an average delay of 15 minutes for departing flights, with anticipation of further delays.