Outflow boundary a downburst. "Gustnadoes", short-lived vertical circulations near ground level, can be spawned by outflow boundaries. Gust fronts create low-level wind shear which can be hazardous to planes when they takeoff or land. Flying insects are swept along by the prevailing winds. As such, fine line patterns within weather radar imagery, associated with converging winds, are dominated by insect returns. At the surface, clouds of dust can be raised by outflow boundaries. If squall lines form over arid regions, a duststorm known as a haboob can result from the high winds picking up dust in their wake from the desert floor.
Operation Eagle Claw as a cracked rotor blade. Its crew was picked up by "Bluebeard 8". The remaining helicopters ran into an unexpected weather phenomenon known as a "haboob" (an enormous, nearly opaque cloud of fine dust particles that can follow a thunderstorm). "Bluebeard 5" flew into the haboob, but abandoned the mission and returned to the "Nimitz" when erratic flight instrumentation made flying without visual reference points impossible. The scattered formation reached Desert One, 50 to 90 minutes behind schedule. "Bluebeard 2" arrived last at Desert One at 01:00 with a malfunctioning second-stage hydraulic system, leaving one hydraulic system to control the