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.
Syrian Desert part in both the commercial and military connections between the two regions. It was, however, raided by the Sasanian emperor Shapur I in the 250s, most of its citizens fled, and under Sasanian rule, the city was subsequently abandoned. The desert was first traversed by motor vehicle in 1919. During the Iraq War, the desert served as a major supply line for the Iraqi resistance, with the Iraq portion of the desert becoming a primary stronghold of the Sunni resistance operating in the Al Anbar Governorate, particularly after the Coalition capture of Fallujah during the Second Battle of Fallujah. A