Investigation of Meteorological condition during air dynasty Helicopter crash using WRF model
Date
2022
Authors
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Publisher
Department of Hydrology and Meteorology
Abstract
Mountain flight remains a considerable challenge in Nepal because of rugged terrain.
Since 1979 A.D, there have been 36 helicopter accidents over different parts of the
country that have claimed 85 lives. Most of the accidents are reported to have
unfavorable weather conditions as the main cause. However, the detailed
meteorological analysis for most of the accidents has not been done yet. A detailed
understanding of the meteorological condition and reliable forecast that may developed
over the complex terrain of the mid-hills of Eastern Nepal Himalaya is yet to be
achieved. This study assesses the weather conditions possibly associated with the most
recent fatal crash at Pathivara Peak on 27 February 2019 using Advanced Research
version of the Weather Research and Forecasting (WRF-ARW) model. Prevailing
weather condition during accident time such as; low ceiling with cloud base, light to
moderate snowfall, poor visibility, below freezing temperature, high amount of water
droplets suggests possible icing on rotor. Icing could be major factor responsible for
the fatal crash. WRF-ARW was reasonably able to simulate the weather condition. This
research recommended that aviation stakeholders and pilots should fly only after a clear
route forecast over the complex geographical condition for the safety of flights.
Keywords: Aviation, Forecast, Icing, Visibility, WRF-ARW
Description
Keywords
Aviation, Forecast, Icing, Visibility, WRF-ARW