Open AccessSimulation of Severe Thunderstorms in Conjugation of Westerly and Easterly on 31 March 2019 in Bangladesh
Author(s) -
Subrata Karmakar,
Mohan Kumar Das,
Md Quamrul Hassam,
Md. Abdul Mannan
Publication year - 2022
Publication title -
journal of engineering science
Language(s) - English
Resource type - Journals
eISSN - 2706-6835
pISSN - 2075-4914
DOI - 10.3329/jes.v12i3.57477
Subject(s) - thunderstorm , weather research and forecasting model , meteorology , severe weather , climatology , storm , tornado , environmental science , troposphere , squall line , atmospheric sciences , geography , geology
The diagnostic and prognostic studies of thunderstorms/squalls are very important to save live and loss of properties. The present study aims at diagnose the different tropospheric parameters, instability and synoptic conditions associated the severe thunderstorms with squalls, which occurred at different places in Bangladesh on 31 March 2019. For prognostic purposes, the severe thunderstorms occurred on 31 March 2019 have been numerically simulated. In this regard, the Weather Research and Forecasting (WRF) model is used to predict different atmospheric conditions associated with the severe storms. The study domain is selected for 9 km horizontal resolution, which almost covers the south Asian region. Numerical experiments have been conducted with the combination of WRF single-moment 6 class (WSM6) microphysics scheme with Yonsei University (YSU) PBL scheme in simulation of the squall events. Model simulated results are compared with the available observations. The observed values of CAPE at Kolkata both at 0000 and 1200 UTC were 2680.4 and 3039.9 J kg-1 respectively on 31 March 2019 and are found to be comparable with the simulated values. The area averaged actual rainfall for 24 hrs is found is 22.4 mm, which complies with the simulated rainfall of 20-25 mm for 24 hrs.Journal of Engineering Science 12(3), 2021, 29-43