An Experiment Using the High Resolution Eta and WRF Models to Forecast Heavy Precipitation over India

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.

Assessment of the Weather Research and Forecasting (WRF) model for simulation of extreme rainfall events in the upper Ganga Basin

“…Some possible factors that could contribute would be that local boundary formulation in MYJ may be more appropriately capturing the vertical environment in the complex terrain compared to the non-local YSU scheme which seeks to simulate vertical mixing and boundary layer evolution using averaged and grid representative fields. With regard to the BMJ CU emerging in the top configuration, there are a number of studies for the ISMR where it has emerged as performing "overall best" (Vaidya and Singh, 2000;Ratnam and Kumar, 2005;Vaidya, 2006;Rao et al, 2007;Kumar et al, 2010;Mukhopadhyay et al, 2010;Srinivas et al, 2013;Sikder and Hossain, 2016). As for the MP scheme, there are limited studies in comparison to those that have studied the CU configuration for the ISMR.…”

Assessment of the weather research and forecasting model generalized parameterization schemes for advancement of precipitation forecasting in monsoon‐driven river basins

“…Parameterization schemes beyond CP and MP were selected based on compatibility with the monsoon-driven climate [e.g., Ahasan and Khan, 2013;Kumar et al, 2012;Rao et al, 2007] and are also shown in Table 1. However, these parameterizations were not part of the sensitivity study.…”

“…In our parameterization and spatial resolution sensitivity experiments, the 6 hourly 18 3 18 resolution NCEP GFS final analyses data were used as the boundary in the WRF model [e.g., Rao et al, 2007]. These boundary data were available through the University Cooperation for Atmospheric Research-Research Data Archive (http://rda.ucar.edu/datasets/ds083.2/).…”

“…Mannan et al [2013] tested the WRF model using different microphysics for an intense rainfall event in Bangladesh. Rao et al [2007] assessed the model for several Indian heavy precipitation events using different microphysics and cumulus parameterization schemes. Pennelly et al [2014] evaluated five different cumulus parameterization schemes for heavy rainfall in Alberta with different grid spacing and reported that at 6 km resolution or higher, the model performance is independent of cumulus physics parameterization schemes.…”

Simulation of the Structure and Track of the Tropical Cyclone Sidr using Numerical Models

“…Mohanty et al [2] used MM5 model to simulate the Orissa super cyclone (1999). Again, WRF model has also been used in a number of studies for the simulation of tropical cyclones [3,4]. There are a number of comparative studies on the performance of the mesoscale models for severe weather events triggered by convection.…”