I posted a question about a week or so ago, and that was whether "an expedited departure " is even a consideration in the very low vis conditions that were reported. There weren't many direct replies although there were some who agreed that it would be unusual to attempt a rolling takeoff in those conditions. In other words, should a more aware controller and a more situationally aware SW crew both understood that an expedited takeoff in those conditions was unlikely to occur?
Did SW have to clear its engines prior to takeoff or not? I haven't seen any definite answer to that although I may have missed it.