NOAA42 P3 will take off at 2AM to fly into Tropical Depression Four. This flight follows yesterday’s 2PM NOAA43 P3 flight. We fly these missions twelve hours apart to measure how the system changes through time. Below is the proposed flight track. The dots on the flight track (shown in green) represent the aircraft turn points. The red dots in the figure show the locations that launch weather balloons twice a day while the purple dots are the locations that launch balloons once a day.