Wind shear, which refers to sudden and sustained changes in the wind direction and speed, could be hazardous to aviation. Windshear is rather difficult to predict due to its transient and sporadic nature. Moreover, the causes of wind shear may be different at different airports. In some places it is caused by microbursts, while in other places wind shear may result from meso-scale weather pheno...

A series of fatal commercial aviation accidents starting in the 1970s led to the identification of thunderstorm-related wind shear as a critical hazard to aircraft takeoffs and landings. In aggregate, these accidents resulted in over 400 fatalities and pressured the Federal Aviation Administration (FAA) to develop effective warning technologies. In response, the aviation community invested in a...

Authors’ address: Dept. of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08540. An aircraft can deviate disastrously from its intended flight path if strong, varying wind (wind shear) is encountered near the ground. Severe low-altitude wind shear, such as produced by the microburst, has caused at least 24 aviation accidents in the last 25 years [l]. Efforts are under...

/ Fort Worth (DFW) is one of for Terminal Weather One of the primary the ITWS is a suite of algorithms that utilize data from the Temlinal Doppler Weather Radar (lDWR) to generate wind shear alerts. DFW also benefits from a Network Expansion of the Low-Level Wind Shear Advisory System (LL W AS-NE). The LL W AS-NE generated alerts are integrated with the radar-based alerts in ITWS to provide Air...

A number of environmental factors control both tropical cyclogenesis and tropical cyclone (TC) intensity, contributing to the challenge of TC prediction. Among these environmental controls is the interaction of TCs with environmental vertical wind shear. Since environmental vertical wind shear is always present in varying amounts during the life of any TC, it is important to understand how wind...

Low-level wind shear, especially a microburst, is very hazardous to aircraft departing or approaching an airport. The danger became especially clear in a series of fatal commercial airliner accidents in the 1970s and 1980s at U.S. airports. In response, the Federal Aviation Agency (FAA) developed and deployed three ground-based lowaltitude wind-shear detection systems: the Low Altitude Wind She...

Estimation of wind speed at proposed hub heights is typically achieved using a wind shear exponent or wind shear coefficient (WSC), variation in wind speed as a function of height. The WSC is subject to temporal variation at low and high frequencies, ranging from diurnal and seasonal variations to disturbance caused by weather patterns; however, in many cases, it is assumed that the WSC remains...

It is well known that vertical wind shear can organize deep convective systems and greatly extend their lifetimes. Much less is known about the influence of shear on the bulk properties of tropical convection in statistical equilibrium. To address the latter question, the authors present a series of cloud-resolving simulations on a doubly periodic domain with parameterized large-scale dynamics ...

In December 2005, operational wind shear alerting at the Hong Kong International Airport (HKIA) reached an important milestone with the launch of the automatic Lidar (light detection and ranging) Windshear Alerting System (LIWAS). This signifies that the anemometer-based and radar-based wind shear detection technologies deployed worldwide in the twentieth century have been further advanced by t...

Vertical wind shear and storm motion are two of the most important factors contributing to rainfall asymmetries in tropical cyclones (TCs). Global TC rainfall structure, in terms of azimuthal distribution and asymmetries relative to storm motion, has been previously described using the Tropical Rainfall Measuring Mission Microwave Imager rainfall estimates. The mean TC rainfall distribution and...