An Experiment Using the High Resolution Eta and WRF Models to Forecast Heavy Precipitation over India |
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| Authors: | Y V Rama Rao H R Hatwar Ahmad Kamal Salah Y Sudhakar |
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| Institution: | (1) India Meteorological Department, , New Delhi, 110003, India;(2) Egyptian Meteorological Authority, Cairo, Egypt;(3) Hinditron Infosystems, New Delhi, India |
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| Abstract: | In the present study using the Weather Research and Forecasting (WRF) and Eta models, recent heavy rainfall events that occurred
(i) over parts of Maharastra during 26 to 27 July, 2005, (ii) over coastal Tamilnadu and south coastal Andhra Pradesh during
24 to 28 October, 2005, and (iii) the tropical cyclone of 30 September to 3 October, 2004/Monsoon Depression of 2 to 5 October
2004, that developed during the withdrawal phase of the southwest monsoon season of 2004 have been investigated. Also sensitivity
experiments have been conducted with the WRF model to test the impact of microphysical and cumulus parameterization schemes
in capturing the extreme weather events. The results show that the WRF model with the microphysical process and cumulus parameterization
schemes of Ferrier et al. and Betts-Miller-Janjic was able to capture the heavy rainfall events better than the other schemes. It is also observed
that the WRF model was able to predict mesoscale rainfall more realistically in comparison to the Eta model of the same resolution. |
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| Keywords: | Heavy rainfall events WRF Eta model mesoscale rainfall prediction |
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