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.
Jewish law in the polar regions should be observed simultaneously even in polar regions. The Bible, Talmud, and individual pre-modern Jewish writers do not address this issue because Jews did not visit the polar regions and were not aware of its distinctive nature before modern times. However, the section in Talmud regarding the "desert wanderer" has been used by modern authorities to analyze this issue. The Talmud contains the following discourse: The law is in accordance with the first opinion, that a confused desert wanderer keeps six "weekdays" followed by one "Shabbat", but he may not perform activities forbidden on Shabbat on any day except to