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.
Regions of South Australia Regions of South Australia In South Australia, one of the states of Australia, there are many areas which are commonly known by regional names. Regions are areas that share similar characteristics. These characteristics may be natural such as the Murray River, the coastline, desert or mountains. Alternatively, the characteristics may be cultural, such as common land use. South Australia is divided by numerous sets of regional boundaries, based on different characteristics. In many cases boundaries defined by different agencies are coterminous. Convention and common use has divided South Australia into a number of regions. These do not always have strict